Once I went a long time without jacking off (2 weeks) after a normal routine of twice a day or more. My prostate swelled a bit, and would keep me from being able to empty my bladder completely when urinating. Going back to regular jacking off took care of that problem. One other time years ago, I had a minor urinary tract infection (dehydration in the Persian Gulf was part of the problem), rehydration and lots of cranberry juice, and things went back to normal.
Regarding standing up vs. sitting down to pee, I sit. I am too tall, and don't want all that splashing and noise. I don't use public toilets unless there is an emergency, and then I would stand to pee, constricting flow to prevent splash-back from the urinal onto me.
As a child I remember my mother making me clean the bathroom because she thought I was the one who was hitting the wall behind the toilet and getting the toilet seat wet. I kept telling her I KNEW I wasn't the one doing it. She didn't believe my protests, and then finally in exasperation I said "It's not ME! I SIT DOWN to pee!" I didn't want to get into details because I have always had a strict sense of propriety, and to me certain things should never be discussed (limbs, body functions, etc. pretty much all the old-fashioned taboo subjects from a century ago!). She left me alone about the bathroom messes after that!
:cheers: