I assume this relates to the business of flushing a wound with one's own urine?
When in civilized locations I generally try to confine my urination to proper restrooms. When out in the boonies, I usually just urinate on the ground. In neither case is sterility of urine (or lack of therof) an issue. However, in both situations I gennerally try to avoid peeing into my wounds. But that's just me.
I hope this comment doesn't p!ss anyone off?