A very loud, ill kempt, mean-acting woman walked into Wal-Mart with her two kids, yelling obscenities at them all the way through the entrance.
The Wal-Mart Greeter said pleasantly "Good morning, and welcome to Wal-Mart. Lovely children you have there. Are they twins?"
The foul mouthed woman stopped yelling long enough to say, "Hell no they ain't. The 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, Ma'am," replied the greeter."I just couldn't believe you actually got laid twice." "Have a good day and thank you for shopping at Wal-Mart."