is not known to cause any negative health implications, does not effect urinating.
All in moderation is the golden rule.
From experience: (positive things about 100% abstaining from masterbration)
Stop masterbrating and you'll see withing 3 months an increase in size and thickness.
Increase in semen output.
Regression of Pearly Penile Papsules (not all gone, but significantly different).
(note: I am not saying these will happen to you, I just speak from what I experienced)