This guy goes to a whorehouse and says to the Madam, "I want to get screwed."

The Madam tells him to go up to room #12 and knock on the door. The guy walks up to the door, knocks on it, and says, "I really want to get screwed, bad!"

A very sexy voice replies "Just slide $20 under the door."

So the man slides the $20 under the door and waits... Nothing Happens! He knocks on the door again, and yells out "I want to get screwed!"

The sexy voice behind the door answers, "Again?"