A very loud, unattractive, nasty woman walks into a Wal-Mart with her two kids yelling obscenities at them all the way through the entrance.
The Wal-Mart Greeter says "Good morning, and welcome to Wal-Mart. Nice children you have there. Are they twins?"
The ugly woman stopped yelling long enough to say, “Hell no, they ain't twins. Oldest one's 9 and the other one's 7. Why the hell would you think they're twins? Are you blind, or just stupid?"
"I'm neither blind nor stupid," replied the greeter. "I just couldn't believe you got laid twice."