I had a urinal conversation turn into a good friendship a while ago.
After high school I joined a fitness group, doing daily classes by the beach. During this time I realised I really enjoyed running so shifted my focus towards that, doing two running classes on Thursdays. We would do a 10k run for our first class and then interval sprints for the second.
The first time I did this I really needed to pee in between the 10k and the interval, on our jog to a hill for our intervals we passed by the toilet block at the beach, so I ducked in and went to the urinal. One of the other guys in the group followed quickly after. He was in his mid-late 20s and more experienced with fitness and running than me.
As he got up next to me at the trough he said "Nothing beats a post run pee" I laughed and said "Yeah I might have hydrated myself a little too well" and said "Still think a mid run pee is way better though". He just laughed and said "Which guy doesn't love peeing outside" then he'd finished peeing first and said Want me to wait up and run with you?.
I obliged and we ended up pairing up for classes from then on.
From then on he acted as a bit of a mentor, we would go on runs on the weekend (yes, I learned he does enjoy mid run pees as much as me) and shower together after.