Robinson came home in great excitement and said to his wife, “You’ll never believe it, dear, but I’ve discovered an entirely new position for lovemaking. “
“Really, “said Mrs. Robinson, interested at once. “What is it?”
“Back to back. “
“But that’s crazy. We can’t do anything back to back. “
“Yes we can. I’ve persuaded another couple to help out. “
This joke is included in the Black Book of Jokes. You can order it from here.