A man took Friday off work. The doorbell rang, and he went to answer it. When he came back his wife asked, "Who was at the door, dear?"
"The milkman," he replied, "collecting his money. Do you know, the cheeky sod told me he'd had it off [had sex with, if you're American] every woman in this street except one?"
"I bet it's that snooty Mrs Jones at number ten!"