Weird male body texture and seam

[kkiiees]

So the story was I downloaded this followers mod:https://www.nexusmods.com/skyrimspecialedition/mods/44136?tab=description and I'm quite disappointed because these guys can have dicks. Then I use SSEEdit to dig deeper and I found that these guys has a custom race called YNfollowerrace.
Then I follow this article:https://www.nexusmods.com/skyrimspecialedition/articles/6049/ to add schlongs to these guy since I'm using The New Gentleman. The guys have dicks now but it look this:
 

I think that the black texture is from the default Skyrim male body but I don't know where it comes from, can anybody help me with this ?

[Grey Cloud]

What did the body look like before you added the schlong? It looks like the original was made with the 'nevernude' body option - hence the underwear.

[kkiiees]

13 hours ago, Grey Cloud said:

What did the body look like before you added the schlong? It looks like the original was made with the 'nevernude' body option - hence the underwear.

Well never mind, I ass brain didn't think of changing their race to nord in the first place, but thanks for asking anyway