Filthy Garbage Disposal

When a chick wraps her midsection with plastic wrap, takes a massive dump, lets it collect in the bag, then, before intercourse, takes a knife and unloads it on her partner's chest.

Depressed Guy: "......"
Friend: "Dude, why are you so sad?"
Depressed Guy: "My girlfriend gave me a filthy garbage disposal..."
Friend: "ZOMG!"