A very loud, unattractive, nasty 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. Nice children you have there. Are they twins?'

The ugly 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 someone would fuck you twice.'