GrammarPoliceReally hoping it's just good bladder control...
The smell of chlorine is actually the smell of piss. Without piss chlorine has a much less potent smell.
https://www.npr.org/sections/health-shots/2017/03/01/517785902/just-how-much-pee-is-in-that-pool
Correct me if I’m mistaken, but iirc it is the smell of the chlorine reacting with any pollutant, not just pee. Skin cells and skin oils will make it smell like that, too.