Q: How many health food freaks does it take to change a lightbulb ?
A: Two. One to remove the old one, and one to check the ingredients on the new one.

Q: How many heavy metal fans does it take to change a lightbulb ?
A: Three. One to change it and two to say "Excelleeeeeent !"

Q: How many Home Secretaries does it take to screw in a light bulb?
A: None - they merely sack someone else for letting it go out.