yeah, saw this one before.....
She's not really having sex, it's her Exorcism that happens.....
It's like a "Coming of Age" thing (like curcumscissors or that jewish "brothel/baptjism" thing).....but for women!
she's becoming a women, so she has to call up a priest to perform an exorcism on her Geed....so all them demonic "Crabs" and "herpies" don't enter her body and shit....
Afterwards, the guy has to jump out a window, cuz he has crabs.....