Different strokes for different folks.
It never ceases to amaze me how sexually deviant we can be. From the fondue cheese to the dildo gas mask to the Cthulhu tentacles, there's always something surprisingly new... and weird. If you can think it up, I guarantee there's someone getting off on it.
Once, while we were hanging out, my friend Zoe noticed that I had a few pimples on my back. She begged me to let her pop them and thinking it'd be funny, I let her do it. Zoe wrapped her legs around me and every time she popped a pimple, she squeezed me harder and whispered "mmm, half an orgasm". We didn't see anything wrong with it until her boyfriend found out. I guess seeing his girl quivering from pimple-popping induced half orgasms wasn't that funny. His jealousy also came from the fact that he was unequipped to satisfy her pimple popping needs. They broke up soon after. I haven't seen Zoe in years, but I wonder if she still gets that explosive discharge whenever she pops a pimple or if she's forgotten all about it.