The Perfect Wal-Mart Greeter:

A very loud, unattractive, mean-acting woman walks into
Wal-Mart with her two kids in tow, screaming obscenities at
Them all the way through the entrance. She's dressed in dirty
Jeans, a greasy t-shirt with holes in it and wearing flip-flops
Exposing her cracked and filthy toenails. When she yells at the kids,
She exposes her yellowed, crooked teeth with more than a few missing.

The Wal-Mart Greeter says, "Good morning and welcome to
Wal-Mart. Nice children you've got there. Are they twins?"
The ugly woman stops screaming long enough to say, "Hell no
They ain't! The oldest one, he's 9 and the younger one,
she's 7. Why the Hell would you think they're twins?
Do you really think they look alike?"

"No", replies the greeter, "I just couldn't believe someone
Had sex with you twice.