My apologies if this is an old one...
Last night my wife and I were sitting in the living room and I said to her,
"I never want to live in a vegetative state, dependent on some machine and fluids from a bottle to keep me alive.
That would be no quality of life at all. If that ever happens, just pull the plug."
Next thing I knew, she got up, unplugged my computer, and poured out all my beer!
She's such a #$%*.