Fess up: you've always wondered why you sometimes shiver when peeing. Well, thanks to science, this oft-silently wondered but seldom asked aloud mystery is now solved:
The [phenomenon of pee shivers] is an example of the human body's autonomic nervous system (ANS) at work.
We are not conscious of the ANS. It runs on automatic, hence its name, "autonomic", which literally means "self controlling, working independently". The urination reflex is relayed through the ANS. The reflex is directly related in strength to the amount of stretch of the bladder. Thus, the degree of shivering is generally related to how full the bladder is at the time of urination.
and by the way the ANS can be controlled, with a little work and time you can achieve amasing things :)
Sounds made up, like Fan Death.
After taking a medication for several months that caused polyuria (excessive urination) as a side effect, I found that going pee-pee had all of a sudden become a nearly orgasmic experience!
Of course, the polyuria itself was pretty annoying, so an adjustment in dosage put an end to all the, um, fun.