porn, for me, made gay sex seem like it'd be amazing. the dudes look to be having the time of their lives. I'm bi, and ended up giving guys a few tries. I made sure they were hot like they are in those videos.
porn was a different world compared to what real sex was with a guy. besides making out, everything else was just whatever. performing bjs on a guy was dull, touching another dick not nearly as fun/exciting as I anticipated, and making another guy come/hearing him was enough to make me want to run out of the room and never turn back.
so porn has not affected me, really, but rather has acted as a deterrent for certain acts. now I will say that guys in general I think give better head. besides that, my interest in them has plummeted. so idk whether to thank porn for making me try new things, or curse it for its unrealistic expectations. you take your pick.