The role a friend plays for their virgin mate, ensuring she doesn't waste her 'first time' on a drunken night, with someone she doesn't care about.
Chrissy: "Hey Stace, can you make sure I don't sleep with anyone tonight - NO MATTER HOW DRUNK I AM"
Stacey: "Sure, I'll be your hymen police"
(Knocking on a bedroom door from which sus noises are coming.)
Stacey: Oi, Chrissy, hymen police...
Chrisy: Intact! Thanks Stace!