A woman, after trying everything and having perhaps worst chronic headache ever, goes to a famous "new age" holistic doctor as a last resort. "Doctor, I have tried everything, but my headache just won't go away."

"The doctor replied, "You have come to the right place. This is what I want you to do: go home, stare at yourself in the mirror, point your index fingers at your temples, and repeat this mantra: "I really don't have a headache, I really don't have a headache".

"Do it as long as it takes, the headache will eventually vanish."

As she leaves the doctor's office, skeptical but curious at the same time, she tries the maneuver in front of the mirror in the elevator. Fingers pointed at her temples, she starts repeating "I really don't have a headache, I really don't have a headache...". She had barely said it four times when she realized her headache was gone. Shocked and elated, she runs back up to the doctor.

"Doctor, you are a genius! Can I please send you my husband? He's been having problems in a certain department... how can I put it... "

"When was the last time you two had sex?"

"About eight years ago."

"Send him over."

A few days later, she is waiting with baited breath for her husband to come home from the doctor. He arrives, asks her to wait, and goes straight to the bathroom. When he comes out, he throws her on the couch and starts making wild passionate love to her, when he's finished, he goes right back to the bathroom.

A few minutes later he comes out, rouses her from her bliss and starts at it again, like an insatiable young man. After another hour of great sex he goes and locks himself in the bathroom again.

At this point the wife had become unbearably curious. She tiptoes to the bathroom door, looks through the keyhole, and sees her husband, staring at himself in the mirror, fingers pointed at his temples, repeating:

"That woman is not my wife, that woman is not my wife....."