When a man does not want a girl to leave during sex: a common technique to keep her "anchored" in bed is to open her anus and insert everything (balls and shaft). Now, she is anchored and she ain't going nowhere.
Bill: ..... then that ho wanted to leave before I was done!
Nick: Did you anchor that bish?
Bill: Damn straight! She was stuck all night!
Sarah: Oh god, I can't walk today....
Mandy: He anchored you didn't he?
Rick: Anchoring just takes a bit of persistance and lube.