Worried about their less than exciting sex life, a young wife sent her husband to a therapist who wound up treating him with self hypnosis. And, to her joy, everything got much better.
However, she could not help but notice that each night, just before their lovemaking, the husband would dash out to the bathroom for several minutes.
This tormented her until finally, one night, she followed him. There, in front of the mirror, she found him applying this therapeutic technique: "She's not my wife. She's not my wife. She's not my wife."