i dont know how it works

like if a "heterosexual" man gets a blowjob or anal and doesn't see (exempli gratia, it's dark) who he fucks with, he would cum
and if a "heterosexual" woman gets a cunnilingus and doesn't see who she fucks with, she would cum
the same with homo as i think

but if they get know who they had sex with, they feel some disgust

and that means that everybody is pan/a