Probably an old joke, but it was new to me: Sam and Susan were invited to a costume party. Susan went out and rented costumes for the both of them. However, when the time came for the party, Susan wasn't feeling well and Sam went on alone. A few hours later, Susan began to feel better and decided to go on to the party. She realized that while she knew Sam was in a gorilla suit, he had never seen her costume, and decided to go and see what he got up to while he was alone. She arrived and observed him dancing closely with a series of beautiful women. She approached him and began flirting, and soon they were taking a walk in the woods alone. They then undressed in the darkness and had sex. She got home before her husband and when he arrived, she was in bed. She asked him, "How was the party?". He replied "Oh, the usual - you know I never have much fun at these things alone." "Didn't you even dance?", she asked. "No, I sat in the den all night playing cards. The guy I loaned my costume to had a ball, though..."