OK, since we're on the sexist jokes, (I'm sure some have seen this one in an e-mail)

The wife goes into the kitchen and sees her husband stalking around with the fly swatter.
She says "What are you doing"
He says "Hunting flies"
She says "Oh, really. Having any luck?"
He says "Yep. I got three males and two females."
She says "How do you know if they are male or female?"
He says "Three were on a beer can, and two were on the phone."