I think i'm asexual, you need to be born with it. I've never watched vanilla porn since i was born and i've never been attracted to it either, just grossed out many times when some friends of mine watched it. I have fapped to foids many years though but not in a pornographic context, more like foids with clothes on, music videos, gym thots and stuff... Can't even get a full boner from that kind of fap material anymore unless i abstain from it for 3 months and then watch it again.
Since i've never had sex i wouldn't know if i'm really asexual or not, although i think i wouldn't be able to get a boner if i got the chance today. That's why i do nofap because my dick is broken since i don't get a boner from seeing a random foid on the street or in a video without stroking it. Just trying to reboot my brain to become normal and hopefully i will be able to stick my erect penis inside a vagina without any problems.
EDIT: I've also eaten a ridiculous amount of candy in the last 20 years or so and candy contains soy/estrogen so that may have been a cause too.