One who has no discernable sexual preference whatsoever. Generally, nihlosexuals are virgins, have not masturbated or will not reveal it, and show no sexual or romantic interest in any human of any sex, animal, plant, or mineral.
"I think Jeff's gay." "No dude, he's just a nihlosexual. He just doesn't care."
The act of performing incest with a father, either yours or a friends. This could include butt-sex, blowjobs, handjobs, and fingering, fisting, and eating out their assholes.
That guys so nidrosexual he ate out Timmys dads asshole.
Bobs such a nidrosexual he fisted Nialls dad and Hyssams dad at the same time.