A deaf couple was in bed, preparing to be intimate. The wife asked her husband if he was feeling kinky. He asked her why, and she described a sexual act she had recently learned about. She explained how she would wear a strap-on and stand on the side of the bed, holding his feet high in the air until his legs went numb. Then she would penetrate him, and his numb lower half wouldn't feel it until she was already inside him. It's called the "Dead Peg Leg".
"I don't know," he replied, "I've never heard of it. "
"That's because you're deaf you silly idiot!"