Even in that scenario, it's only the guys who know they got a nice body. You never see fat or stick thin men post shirtless photos to flaunt their non-existent abs, yet these girls think they've mastered the fuckboy persona lol.
As a woman I can confirm it's the latter. Maybe that's just me and I'm talking out of my ass but I've never actually come across a scenario in real life where a woman found herself more attracted to a gay man solely because he's unobtainable, it only happens if he's also hot.
It's funny you mention TLOU because it's a perfect example now that I think about it. Ellie and Abby are both tomboys: one of them still looks feminine and soft despite having realistic female muscles, and the other looks like such a bad caricature more than half the internet unironically believed she had to be a TIM because no actual woman looks like that, even jacked up female bodybuilders. Which one do you think straight men found more fappable?
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It's almost like no matter how "gender non-conforming" you are, women are still women and men are still men. It's also almost like men aren't looking for an exaggeratedly feminine caricature of a "woman," but simply a woman regardless of how she dresses, and it doesn't matter how many layers of make up, press on nails and crop tops you wear as a HSTS, no straight man will wanna date you lol.