George Burns was always doing things to make Jack Benny laugh. It drove Benny nuts that he was unable to reciprocate.
One day, Benny was staying at a hotel in New York and Burns came by to see him. Burns phoned from the lobby and said he was on his way up.
This was Benny's opportunity. He took off all his clothes, put one of his wife's hats on his head, stuck a bouquet of flowers between his butt cheeks and stood on a chair, posing on one foot like a statue. He was certain the sight would move his friend of many years to hysterical laughter.
Moments later, there was a knock on the door. "Come in," Jack yelled.
Whereupon George, sensing something was up, sent one of the hotel's maids in first.