Related:

• How many aerospace engineers -- does it take to change a light bulb?
  None. It doesn't take a rocket scientist, you know....
• How many Scorpios -- does it take to change a light bulb?
  Why do you want to know? Are you a cop?...
• How many theoretical physicists -- does it take to change a light bulb?
  If you know how many, you can't know if they've done it yet....
• How many Contras -- does it take to change a light bulb?
  Only one, but he doesn't know where it came from....
• How many quantum mechanicians -- does it take to change a light bulb?
  They can't. If they know where the socket is, they cannot locate the new bulb....
• How many massage parlor attendants -- does it take to change a light bulb?
  Whatever number turns you on, big boy....
• How many Libras -- does it take to change a light bulb?
  Well gee, I don't know really. I guess it depends on the bulb and where it burned out....
• How many husbands -- does it take to change a light bulb?
  We'll know as soon as one gets off the couch and does it....
• How many librarians -- does it take to screw in a light bulb?
  I don't know, but I can look it up for you....