How many psychologists does it take to change a light bulb?
- None. The light bulb will change itself when it's ready.
- Just one, but the light bulb really has to want to change.
- Just one, but it takes nine visits.

How many psychiatrists does it take to change a light bulb?
- "How long have you been having this fantasy?"
- "Why does the light bulb necessarily have to change?"
- One, but he must consult the DSM-IV.

How many psychoanalysts does it take to change a light bulb?
- "How many do you think it takes?"