Changing gender without changing sex

[fristvik]

Is there any way to make a game think that a character is other gender, WITHOUT any appearance change? The question may look weird as there is a decent custom gender system in SIMS 4 already.

But it is not so decent when we deal with adult mods. For example, if I want to make a feminine young man, the most obvious way is to choose a male gender with a feminine frame, but then I have several problems:

 1) Skin and breast problem. Custom HQ skins are usually made for manly men either feminine women. In first case we’ll get hairy and muscled body, in second there’ll be breast shadows on a chest (which is curable by PcNerd’s mods for flat chest). So, in terms of skin it is better to take a skinny female body with flat chest.

 (Or forcing the game to use a custom skin for females on a male body with feminine frame, will be thankful for advices how to do it)

2) Male genitals. Pornstar cocks work for every custom gender, but they look absolutely unnatural. Lunar eclipse gents are better, but they are not size customizable. The best are gents from Simdulgence, but they do not work with alternative frames.

3) Tried to make something believable out of masculine frame but failed (very thick neck, and other problems).

So I ended with a female + feminine frame + masculine clothes preferences in CAS, and male genitals for females from  Simdulgence. Looks fine, acts fine (with WW appropriate preferences) but the Game dialogues and stats treat my character as a female (sister, daughter and so on). Changing gender in CAS will change its appearance, which is bad.

Any advice is welcomed!