Penstruation: menstruation that is brought on by penile penetration, despite the subject being pre or post menstruation. Penstruation is often discovered, post-coitus, due to bloody sheets (or other stained lovemaking surfaces). Anecdotally: women who have experienced penstruation report that it is associated with passionate, vigorous (condomless) sex, a fairly well endowed partner, and voluminous deposits of sperm, which may be why neither party usually minds the bloody after-effects too much.
"So, in a case of penstruation, who is responsible for washing the sheets, the girl or the guy?"
A really fucked up fetish were a guy rips out the eye of the victim and than proceeds to use the eye socket like a vagina eyepenetration is usually combined with gore and murder
Penetraitor is the name given to the musical spirit of said band. It shall penetrate your senses, giving you an entirely orgasmicexperience, similar to sex.