A recent thread brought this to mind:
http://www.jehovahs-witness.com/10/86271/1.ashx
I had a male friend, when I was a JW, who was taught by his mother to always sit when he pee'd. It certainly ensured there was no splashing, and reduced her cleaning (allegedly).
I can honestly say that I've never sat to just pee, in my entire life.
Anyone else know anything about this obscure practice?