1999 August 22, “Re: Swimming after eating”, in alt.folklore.urban (Usenet):
As was the caveat about peeing in a pool. Of course, peeing in a pool wasn't dangerous to the person ... If you peed in a pool, and you were carrying the polio virus, presumably *other* people were put at risk, not the peer (pee-er?).
2006, James C. Coomer, Possibly the Best Golf Vacation Ever:
If it did, and if the color became increasingly distinguished, that, in some mysterious way known only to women and their gynecologists, was evidence that the pee-er was, in all likelihood, pregnant.