I not advocating the practice by making this post...however....urine is considered one of the most sterile body fluids...no bacteria or other pathogens. I have scrubbed in on several surgeries and the surgeon uses the persons own urine as a sterile wash.
On a non-medical perspective, many culture view urine as scared.
Just my two cents.....
No....I don't play in watersports...just knowledgeable on the subject.
And another thought.....we all are in swinging because embrace alternative lifestyles....one persons "EWWWWW" is another's fantasy.