Maybe it is just not finding lesbians or lesbian sex hot, but boring to see? I find two lesbians in action with each other even more boring as two gay men, I do not download it from pornhub or whatever either. Especially in a male MC game. I like my male MC game to be mainly about the sex life of my male MC and not of NPC's together even if I will survive a scene or two whether lesbian, mom on dad or whatever. The less time a dev wastes on those kind of scenes and includes scenes I do like though the better in my personal opinion. (Yup I am as selfish as those lesbian lovers in male MC games that like many of those scenes for their benefit and prefer sex scenes I find hot in games I play instead of ones I find boring. Is it not very weird?
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Let's stop with the representation thing though finally, lesbian sex and especially every female is a wet noodle meme is just a overdone fetish in most AVN's and especially male MC harem games like futa, incest, bdsm, femdom and so on. Rarely has anything to do with realistic portrayal ( a lesbian would rather bite your dick as suck it unless you have some form of mind control. They just are not sexually into males, just as your average straight male is not.
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Feel free to enjoy it, ask for lesbian scenes if enjoy them as a fetish, but stop acting it is for representation or so called realistic purposes por favor. I will ask for them not to be shown in male MC games though even if have a lesbian couple that are good friends with MC and undoubtedly have a sex life together off screen, Just keep it there.