A woman was having problems with her kitchen sink, so she asked her husband to see if he could fix it.  When she left to go to the grocery store, he was lying on the floor on his back looking at the pipes under the sink.

After she left, he realized he couldn't fix it so he called a plumber.  The plumber arrived and started working on it so he went on to watch the game on TV.

His wife arrived home to see what she thought was her husband still working on the sink, so she got down on her knees and started fooling around. 

The plumber was surprised and started up, knocking himself out on the drain trap. 

This is a true story that was on Real People back in the '70's.  I would love to have been there when they called 911 to hear their explanation.