I was sexually indifferent to all non vanilla/alternative (chicks with dicks, bestiality gendered/asexual) porn until about a year ago. Before then I was constantly exposed to it while porn surfing, but it never triggered a response for me. Then I took a huge dive off the deep end. I'm thoroughly unconvinced that sexual attraction is ever actually determined biologically (as in your mind never develops a preference until you choose to observe something in a sensual way, consciously). If you alter your mindset to associate something with pleasure then the sexual stimulation will follow. I haven't tried jacking it to exclusively gay porn (futa is probably gay though and non gendered fictional depictions are also non heteronormative), but I can say that things that I would have never even imagined would cause me to be aroused now do and I'm well out of puberty. I'd have to say it's a semi-conscious choice caused by experiences with contexts that make you associate them with sexual stimulation. [spoiler][existentialism intensifies][/spoiler] [spoiler]the interwebs has destroyed me emotionally[/spoiler] [spoiler]I'm debating sterilizing myself now[/spoiler] [spoiler]end this existential nightmare[/spoiler]