Mechanical Sex Edition.
No, ladies and gents, I'm not speaking of the use of machinery when having sex (although I have seen more than a few examples, but that's a tale for another time).
I ran across an article that describes a new type of medical condition called Sexsomnia. Apparently, this condition involves mainly men who fall asleep, but suddenly have rough, 'mechanical' sex with their partners, with no regard for their comfort. And according to the study in the article, it runs in families through the male line.