Constipated

A man was constipated, so he decided to go to the doctor. The doctor examined him and explained, "I'm going to give you some suppositories. I'll insert one now, and then I'll give you another one for later this evening." Later that evening, the man asks has his wife to insert the suppository. She agrees reluctantly, then puts one hand on his shoulder and inserts the suppository. Suddenly, her husband shrieks, "Aahhhhh!" "What's wrong? Did I hurt you?" she asks. "No... I just realized that the doctor had both his hands on my shoulders!"