Originally Posted by GPK

I have to say this is my best one

A very ugly woman walks into Wal-Mart with her two kids.
The Wal-Mart Greeter asks, "Are they twins?"
The ugly woman says, "No, he's 9 and she's 7. Why? Do you think they really look alike?"

"No," replies the greeter, "I just couldn't believe you got laid twice.