Obviously they are not all that normal if they're getting off to weird, off the wall bullshit that's only tangentially related to sex. Unless you're whining about garbage paraphilias like fucking feet or something, in which case, go read a fucking book on it.
I'm just pointing out the human mind does weird shit sometimes when it is exposed to crap at an early enough age. Because honestly, we're all born retarded to a degree.
the machanism is still the same>get exposed to weirdo bullshit>this is emotionally arousing>young kid cannot properly digest the high amount of emotional arousal>pops a boner or gets processed in such a way that it becomes boner inducing >>114130785
Stop being a repressed prude and fucking go to tumblr if you can't deal.