A very loud, unattractive, hard-faced woman walks into Tesco with her
two kids in tow, screaming obscenities at them all the way through the
entrance. To put it mildly she has a face like a bulldog licking pi55 off a nettle.
The door greeter says, "Good morning and welcome to Tesco madam, nice children you've got there. I take it they are twins?"
The fat ugly woman stops screaming long enough to snarl:
"Of course they bloody aren't! The oldest is nine and the youngest is
seven. Why the hell would you think they're twins?..... Do you really think
they look alike, you moron?"
"Absolutely not," replies the greeter, "I just can't believe anyone
would shag you twice!"