Listen to the music

One day a man returns home from work to find his wife in bed with another man with his head between her breasts. He cries, "What the hell do you think you are doing?" The young man replied, "Listening to music." The husband pushes the man aside and puts his head between her breast and listens. "I don't hear any music!" says the husband. To which the man replies, "Your not plugged in."