Okay, for some unknown reason, this just popped into my head today. It is a joke my grandmother told me when I was quite young and I was both delighted and horrified when she told it to me. Delighted because it was "naughty" and horrified because she was always so proper and it just wasn't her style. Ready?
What did the stomach say to the burp?
"If you're quiet, I'll let you out the back door"
Knee-slapper, eh? That Granny!