Piss Shiver (thing)

That brief shudder of ecstasy which occurs occasionally when you drain the main vein.

Informal polling seems to indicate that this phenomenon is much more prevalent among men than among women. Hmmm, perhaps it has something to do with the position. I will volunteer to pee sitting down for a week if one of the lovely young ladies on Everything will volunteer to pee standing up for a while. Note: You might want to use the bathtub