Which being very knowledgeable you will know it doesn't 
There is no evidence that urinating after sex reduces the risk of an STI in both men and women. There is some evidence that, for women, urinating after sex may have a small beneficial effect on reducing UTI's related to sexual activity 
I was waiting your response, as far as I am concerned condom use with all partners, for all intercourse, regular testing including oral swabs (yesterday the GUM decided I can once again have anal swabs if I wish) as per advice from GUM, trying to avoid cross contamination with hands, covering toys with a condom, insisting on oral swabs, use of mouthwash and disinfecting/cleaning toys as soon as I can after a booking are my standards.
A high water and other fluid intake means I urinate frequently anyway, at least twice during a multi hour booking and likely immediately after without a thought. Often surprised how many punters do not urinate during a long booking. I understand urination is not possible for men with an erect penis but a booking is not necessarily a constant hard on for some of the instances I am thinking about.