One night a man was getting very drunk in a pub.
He staggered back to take a piss, whipping his prick out as he went in the door.
However, he had wandered into the ladies room by mistake, surprising a woman sitting on the can,
“This is for ladies!” she screamed.
The drunk waved his dick at her and said “So is this!”
This joke is included in the Black Book of Jokes. You can order it from here.