This information is actually easy to find and is available under the mod's description, but I understand if you couldn't find it due to the lack of the page's organization and difficult readability.

You or an NPC can become a milkmaid by:

• Drinking Lactacid
  • includes Lactacid feeding via MME's Milk Pump
  • being forced to drink Lactacid via SkoomaWhore by using the MME SkoomaWhore Patch
    • SkoomaWhore method is Player Only
• Getting Pregnant via a compatible Pregnancy Mod
  • Beeing Female, Fertility Mode [or] Fertility Mode + Fixes and Tweaks (aka FM+), Hentai Pregnancy, and Soul Gem Oven
  • Player Only
• Drink "Race Milk" (more on that later)
• Making yourself a milkmaid/milkslave via the MCM debug menu

As far as Milkslaves, I do not know for sure how those work. From the MCM menu debug options, it seems that milk slaves have a static rate of milk production whereas Milkmaids have dynamic production based on various factors (though this can be configured in the MCM).

You will start producing milk after you become a milkmaid (obviously), but your "limit" on how much milk you can store in your breasts is limited by your Milkmaid Level. At Level 0 your maximum amount of stored milk is 2 units (aka, 2 bottles). By default, your breasts will reach their limit very quickly as you will produce 0.3 units of milk every in-game hour. This means you'll be full in less than half an in-game day, your milk will start leaking, and you'll have your maximum carry weight reduced by the amount of milk in your breasts, in addition to the permanent carry weight you lose from suddenly realizing you HAVE tits as a milkmaid, and this permanent carry weight reduction only increases as your Milkmaid Level increases (which is supposed to reflect your boobs getting bigger and therefore heavier as they gain the ability to store more milk).

Yes, you heard correctly. Your female character will have her magically weightless bosom suddenly get thrown back to reality and feel the effects of having two fleshy weights on her chest once you become a milkmaid instead of that aspect having been taken into account from the start, but whatever. That in itself is honestly not a huge deal, but seems odd that you don't have that debuff from the start despite not being a milkmaid.

I highly recommend you turn on the debug options and decrease the milk production rate to a value much lower than default. Also, I recommend turning OFF "MaidLevel based MilkGen" - at least to start. You can always turn it back on later.

The setting you're looking for is: "Milk Generation/hour (base value)". The number you see next to this option shows you how much milk you're generating per hour as determined by the formula below. If you have "MaidLevel based MilkGen" activated, it will alter the formula for milk generation.

Here is the formula for milk production per in-game hour:

(BreastSize + MilkGeneration * MilkMaidLevel)/30 * (1 + Arousal/100)

/*
MilkMaidLevel is treated as 1 unless "MaidLevel based MilkGen" is activated, in which case it is equal to your Milkmaid Level.

I don't know how Ed86 managed to do this. The formula as written in the actual code has the MilkMaidLevel variable missing, yet I get the correct result by placing the variable there.
The code is so spaghetti that he has a ghost variable.

BreastSize is 1 by default.

Breast Size modifiers can be found in the MCM, however I believe they're only visual settings aside from the "Breast Base Modifier" debug option, which I wouldn't recommend messing with.

Visual breast size will increase per Milkmaid Level and per unit of milk stored in the breasts (unless turned off).

If you don't alter the base milk generation setting, you'll be constantly dealing with the negatives of having milk-stuffed breasts - particularly when you first become a milk maid due to your low "storage" limit. If you play with Frostfall, you're also going to get wet from leaking tits so that's a big problem for staying warm. Additionally, the milk production rate is ludicrously higher than real life, especially considering you start producing milk immediately upon conception if you're using MME with a pregnancy mod - which is also ludicrously unrealistic.

I know, I know, it's a fantasy game, realism shouldn't be that big of a deal - and to be honest, it's not. It's simply a compounding factor for the mod's other issues.

But seriously, cut down that production rate HARD or you'll be stuck in the milk pumps for half your playthrough AT LEAST.

But if you like it that way please don't let me stop you. Enjoy the game/mod however you want.

"Wait... then what's 'Milk Generation Increase' in the settings???" - Oh you poor child. That is how much your milk production INCREASES EVERY HOUR! Yes, once your mammaries start making marvelous milk it's just going to snowball until until you reach the mod's hard limit (if it even has a hard limit) and become a walking milk fountain, breaking the laws of physics and biology, dumping rivers of milk from your breasts wherever you go. Therefore I recommend setting this value to the minimum, which is 0.003 in the MCM.

Your milk production rate is also modified by your Arousal. Each point of arousal gives you an additional 1% milk production rate, meaning at 100 arousal you're producing twice as much milk compared to 0 arousal.

Based on the formula, I would recommend setting the base Milk Generation to 2 when you first become a milk maid. This will make it less likely that you'll need to milk more than once per in-game day when first starting out, unless you drink Lactacid and/or have consistently high arousal. Your base Milk Generation will increase by 1 every 2 in-game weeks if you use my recommended "Milk Generation Increase" setting of 0.003, but this should be ok as you should level up and increase your maximum capacity before it gets too out of hand, as long as you haven't set the mod's "difficulty" above Adept. (You can also set the production rate back to 2, or whatever value you think is appropriate, in the debug menu whenever you want. The production rate increase is not permanent in any way, but it can get annoying to manage depending on how you play.)

However, if you are not pregnant or under the effect of Lactacid, your milk generation will DECREASE by the amount designated by "Milk Generation Increase" every hour until you eventually reach 0 and lose your milkmaid status.

I cannot currently confirm if you retain your Milkmaid Level if you lose Milkmaid status.

It's supposed to make you (or the NPC) produce milk faster. In the MCM, you should find a setting labelled "Lactacid Bonus Rate" or something very close to that. Like everything else in this mod though, it's not simple.

Lactacid has widely varying returns depending on the number of Lactacids consumed and how quickly they're consumed. If you drink many Lactacids at once, you'll get a vastly increased milk production rate which will slowly taper back to normal over time. Alternatively, you can spread out when you consume the Lactacid but you'll ultimately get less milk because it won't last any longer than consuming all of your Lactacid at once.

Here is the formula for the Lactacid bonus you receive:

LactacidFactor = (LactacidCount * LactacidCount)/LactacidMod/MaidLevel

LactacidBonus = MilkGen * LactacidFactor

Total Generation = MikGen + LactacidBonus

/*
LactacidCount is the amount of Lactacid units currently in your "pool".
LactacidMod is the Number designated in the MCM settings - Ironically, a higher number results in lower output
LactacidBonus is the number generated from your current Milk Generation and the calculated Lactacid Factor, to then be added to you Milk Generation afterwards and give you your total milk generation WITH Lactacid.

However, by default, your Arousal also determines how quickly your Lactacid wears off. The hornier you are, the quicker your Lactacid goes away.

Lactacid is tracked in "units". Every bottle of Lactacid you character consumes adds 1 unit to your character's Lactacid pool, and you'll maintain your increased production rate as long as your Lactacid pool remains above 0. This means you can drink any number of Lactacids you want and the duration will stack.

You can change how quickly Lactacid decays in the MCM, but the following formula is used if you set the decay rate to 0:

'Lactacid Lost Per In-Game Hour' = 0.333 * BreastRows * (1 + (Arousal/100)) * t

/*
"t" is the number of hours that have passed since the last 'check' the mod has performed.
"t" is set to 1 at the beginning of every in-game hour.
If you Wait or Sleep, "t" is set to the number of hours you Wait or Sleep

BreastRows is exactly what it sounds like. This mod allows you to have up to 4 rows of breasts. By default, this will be 1.

As noted above, Lactacid will also turn you (or an NPC) into a Milkmaid if you or the NPC is not already a Milkmaid/Milkslave.

DO NOT SELL YOUR MILK LIKE OTHER ITEMS.

Your bottles of milk that you produce DO NOT take the Economy part of MME into consideration in their value calculation. They will always appear as if they will sell for very low (3 to 6 gold for Normal Milk). This is a false representation of how much you'll actually get if you sell them correctly.

You need to sell your milk via a special dialogue option at certain NPCs. The dialogue option you're looking for is "Hey there".

"Hey there" is the dialogue option that branches into every other possible dialogue option this mod offers. This includes "Dialogue Milking" which results in a Sexlab Scene where an NPC drinks your milk straight from the source (No, you don't get the milk bottles after sex-milking. The greedy bastards drink you dry.)

You have 6 different categories of NPCs to talk to in order to sell your breast milk, but each one is looking for a specific type of Milk to buy from you.

• Farmers want Normal Milk and Race Milk
• Inn Keepers want Race Milk
• Alchemists want "Special" Milk
• Orc Wise Women want All milk*
• Fences want All Milk
• Khajiit Caravaneers want Normal Milk or Race Milk
  • Khajiit will also trade you Lactacid in exchange for ANY milk**

* - Technically, Orc Wise Women want only Normal or Race milk, but since all of them are also Alchemists, they will also buy Special milk, meaning they will effectively trade any milk.

** - I haven't tried trading milk for lactacid at the time of writing. I will update when I do.

HOWEVER, there's a problem. The mod as currently released by Ed86 prevents you from getting the "Hey there" dialogue option from Farmers, Orcs, and Khajiit because the mod is looking for a variable which is improperly implemented and therefore results in a broken condition list and blocks you from selling to anyone except Inn Keepers and Alchemists. Due to the type of milk Inn Keepers and Alchemists are looking for, this means you can't sell 99% of what you produce, if not all of it.

However, I have edited the plugin and removed that broken variable from the conditions and fixed the issue. I have attached my edited plugin file for anyone to use until Ed86 (hopefully) releases an official fix. (NOTE: This is MME New, which is intended for Special Edition. I do not know if it is compatible with Anniversary Edition. Use at your own risk.)

I highly doubt Ed86 is going to fix the mod. He seems extremely disinterested in fixing it, even after I showed him what was causing the problem. However, maybe there's a language barrier and he doesn't know how to properly say that he's busy and doesn't have the time right now? I hope that's the case. Otherwise, he doesn't seem to care at all, which is very frustrating.

Additionally, my edited plugin allows for NPCs added by other mods to fulfill the requirements necessary to sell your milk to them.

(I will revisit this dialogue tree further down, it's difficult to explain in a good order)

Here are the 3 type of milk you can make:

• "Normal" Milk (Received in most cases after milking)
  • Milk, Dilute
  • Milk, Weak
  • Milk, Regular
  • Milk, Strong
• "Race" Milk*
  • Milk, Tasty (Race Name)
  • Milk, Creamy (Race Name)
  • Milk, Enriched (Race Name)
  • Milk, Sublime (Race Name)
• "Special" Milk*
  • Milk, Tasty (Race Name) + (Vampire, Werewolf, or Succubus)
  • Milk, Creamy (Race Name) + (Vampire, Werewolf, or Succubus)
  • Milk, Enriched (Race Name) + (Vampire, Werewolf, or Succubus)
  • Milk, Sublime (Race Name) + (Vampire, Werewolf, or Succubus)

* - Race Milk and Special milk will have the Race Name match the producer's race, and you must achieve a Boobgasm** while being milked. For example, if you are a milk maid and you are a Nord, if you have a Boobgasm wile being milked you might produce "Milk, Creamy (Nord)" bottles. Additionally, if this same character is a Vampire, you might produce "Milk, Enriched (Nord Vampire)" after a Boobgasm. Additionally, Race and Special milk have strong additional properties that you can benefit from for a short time after consumption. However, due to how many effects you receive at once, the text is so small it's nearly impossible to read on most screens.

** - Normally, your character (or the NPC) needs to be at 99 arousal before they can have a Boobgasm. However, for those who like/need to manage their character's arousal, I have attached an edited script which reduces this to be 50 or more.

When you are finished milking, the mod does two checks to see what you produced and how much of it you produced, one for Normal Milk and one for Race/Special Milk.

The strength of Normal Milk you receive is based on how full your breasts are when you start milking:

• Less than 25% full = Dilute
  • Tip: You will never receive Dilute milk if you enable "Milking Requires 40% Fullness"
• Less than 50% full = Weak
• Less than 75% full = Regular
• At Least 75% full = Strong

The number of Normal Milk bottles you receive is, once again, a convoluted formula:

The strength of Race/Special Milk you receive after a boobgasm is based on your Milk Maid level:

Tasty = Level 1, 2

Creamy = Level 3, 4, 5

Enriched = Level 6, 7, 8

Sublime = Level 9+

The number of Race/Special Milk Bottles you receive is supposed to be based on how many times you have a boobgasm while milking. However, if you have "fucking machine" enabled, this will cause any orgasms you have while in the milkpump after you've run out of milk to not count towards your boobgasms, so I would recommend turning that feature off since it doesn't seem to do anything useful anyways.

The number of Race/Special Milk bottles you receive will usually subtract from the number of Normal Milk bottles you receive, which makes sense.

Due to when the formula for normal milk is applied, you can get a net increase of total milk if you have enough Boobgasms to counteract the "lost" units of milk when calculating normal milk. I have not checked if there's a failsafe in the code to prevent this, but based on my other findings I don't believe there's a failsafe against this exploit.

Again, all of this is speculation from trying to decipher the code and the results of my own testing.

To reiterate, you are looking for the "Hey there" dialogue option in order to sell your milk.

After that, you will see one of the following dialogue options after they say "Yes?": (Any grammar or spelling errors in the dialogue options below are done on purpose. This is how they are presented in MME)

If any of these dialogue options isn't showing up, one of the following has happened:

1. You're talking to the wrong NPC
2. You don't have the right milk to sell, or you don't have any milk to sell at all
3. That NPC has been removed from the necessary faction(s) for that option to appear, and is therefore a "wrong" NPC
4. You're not using my edited plugin
5. It Just Works

Farmers - "Are you interested in some fresh milk?"

Inn Keepers - "I heard inns are buying special milk, are you interested?"

Alchemists - "I've heard alchemists buy some special milk, are you interested?"

Orc Wise Women - "Can i interest mighty orcs with milk?" [or use Alchemist option]

Khajiit Caravaneers - "I was woundering if Khajiit is interested in some fresh milk?"

Fences - "Psst, i got some milk to sale, intested?"

This one is very complicated, but I'll try to explain the important parts as simply as possible.

By default, the Market Information tab of the MCM will show each market* the mod tracks along with two numbers:

Market_Name NumberA(NumberB)

* - Each Hold, the Khajiit Caravans, and Solstheim are individual markets with their own demand

"NumberA" is the demand for milk in that market. This number has a maximum of 200 and minimum of -100. This is what I'm going to refer as "Basic Demand". Basic Demand only affects if you're going to be taxed on your milk sales, which is why it's optimal to sell your milk to a market that has no tax on milk. The mod will notify you of high Basic Demand when this number reaches its maximum value of 200. Basic Demand applies to all types of milk.

"NumberB" is the "Service Tax" that will impact how much gold you receive when selling milk. This number represents a percentage of your "Base Payout" that will be deducted from your "Final Payout" (these numbers are derived from a very complicated formula). However, this percentage will always be 0 unless a market's demand falls to 79 or lower. The percentage will be 0, 25, 50, or 75 depending on how low the demand has fallen.

There will also be "Craze" events that happen randomly at individual markets. Craze events will create a special demand for a certain type of Race Milk, as well as raising the Basic Demand to 150 if it was not already 150 or higher. If you sell Race Milk to a market with matching demand, you will get a 50% bonus to your payout. Crazes only apply to Race Milk, but you can still sell any milk that doesn't match the Craze without penalty. Special Milk does NOT count as Race Milk.

If too many markets reach a Basic Demand level of 200, the mod will decrease the Basic Demand in those markets by a pseudo-random amount via a "Saturation Event". I say "pseudo-random" because there are 5 different values the market's Basic Demand can be reduced by as a result the Saturation Event:

• 0 (10% chance)
• 40 (20% chance)
• 60 (40% chance)
• 85 (20% chance)
• 160 (10% chance)

Basic Demand decreases by the "Base Payout" value when you sell milk. This is NOT equal to the amount of gold you receive, aka your "Final Payout".

Lastly, there is also "Upkeep" for the milk pumps that's supposed to be applied when you sell your milk. I say "supposed to" because I am not sure if I paid an upkeep cost last time I sold milk in-game. I also received more gold than the prompt said I would, so there's that too.

Upkeep is supposed to be equal to twice the number of bottles you've pumped since you last sold milk. (A surprisingly simple portion of the mod)

This is actually rather straight-forward. There are 5 main factors affecting how much money you get from milk:

1. The Base Value of the milk you're selling (detailed below)
2. Your Milkmaid Level
3. Your Speechcraft Level
4. Your Haggling Perk Level
5. The Milk Price Multiplier you set in the MCM (default 1)

As you can imagine, the higher all of these are the more money you will receive.

The Base Value of milk can typically be checked by looking in your inventory. However, mods affecting trade could potentially change these values - for better or worse.

The Base Value for each type of milk is as follows:

• Normal MIlk
  • Dilute - 3 gold
  • Weak - 4 gold
  • Regular - 5 gold
  • Strong - 6 gold
• Race Milk
  • Tasty - 7 gold
  • Creamy - 8 gold
  • Enriched - 9 gold
  • Sublime - 10 gold
• Special Milk
  • Tasty - 12 gold
  • Creamy - 13 gold
  • Enriched - 14 gold
  • Sublime - 15 gold

Are you sure?

Yes

Note to everyone - This is not written in any actual programming language, and is not written in papyrus either. 
It is written to be readable and understandable to as many people as possible, no more, no less

-----------------------------------------------------------------

  ---Pre-Payout Calculation---
  
baseTrade = "BaseMilkValue" * "Number_of_Milk_Sold"
MilkPriceMod = "Milk_Price_Multiplier_MCM_Setting"

if ("Speechcraft" = 100) 
	priceFactor = 2 | If Speechcraft is level 100, set "priceFactor" to this number, otherwise do the next thing
else
	priceFactor = 3.3 - (1.3 * "Speechcraft") / 100
	

if ("Haggling_Perk_Level" = 5)
  hagglingSkill = 0.3
else if ("Haggling_Perk_Level" = 4)
  hagglingSkill = 0.25
else if ("Haggling_Perk_Level" = 3)
  hagglingSkill = 0.2
else if ("Haggling_Perk_Level" = 2)
  hagglingSkill = 0.15
else if ("Haggling_Perk_Level" = 1)
  hagglingSkill = 0.1
else
  hagglingSkill = 0
  

goodCustomerModifier = "MilkMaidLevel" / 50 
sellPriceModifier = (1 + hagglingSkill) * (1 + goodCustomerModifier)
baseTradeAdjusted = (baseTrade / priceFactor * sellPriceModifier) * MilkPriceMod

if ("Selling Craze Milk" = true)
  finalBaseTrade = baseTradeAdjusted * 3
else
  finalBaseTrade = baseTradeAdjusted * 2

  
  ---Tax Calculation---
  
marketDemand = "The Demand Value of the Market you're selling to"

if (marketDemand < 0)
	serviceTax = 0.75
else if (marketDemand < 40)
	serviceTax = 0.50
else if (marketDemand < 80)
	serviceTax = 0.25
else
	serviceTax = 0

  ---Upkeep Calculation---
  
milkUpkeep = "Number of Bottles Received" * 2

  ---Payout Calculation---
    
Payout = (finalBaseTrade - milkUpkeep - serviceTax) * 2.5 | This number is rounded up if it results in a decimal number

if Payout < 0
  Payout = 0 | In case the above calculation results in a number lower than 0, set the Payout to 0

-----------------------------------------------------------------

"Payout" is the amount of gold you receive after you have gone through all of these steps