I found these the other day, not very PC but hey what the hell
How many counsellors does it take to change a lightbulb?
Only one, but the lightbulb has to want to change.
Why does it take two women with PMS to change a light bulb?
Because it FUCKING DOES OK!
How many sex therapists does it take to change a lightbulb?
Two - one to put it in and the other to tell them they are screwing all wrong
How many feminists does it take to change a light bulb?
21 ~ 1 to change it and 20 to hold a discussion on the passive role of the socket.