Pat and Mike are having a drink in their favorite pub. Pat says to Mike, "You know there's a new bar that I've heard is good."
"Oh yeah," says Mike "and why is that, boyo?"
"You see," says Pat "I hear that they'll give you a beer for fifty cents, then take you into the back room where you'll have sex all night."
"Let me get this straight." says Mike. "They give you a beer for fifty cents and then they take you into the backroom for sex all night." says Mike. "And how do you be knowing about this then?" asks Mike.
"Surely," says Pat "it was your sister what told me."