I actually pee in the shower while standing in front of the sink brushing my teeth! Yeah, I'm that good! ; )
i sure as hell don't masturbate in there, water makes the worst lube on the planet. other than maybe icy hot.
It happens to us all, water stimulating the sensitive parts that are preparing for an expulsion of excess liquid - just be careful when breaking wind in there however - Ooh Err!
Peein' in the shower is soo good. One of my favorite places to pee! Wrote a little ditty 'bout it too.
It is difficult to not pee in the shower unless you pee right before you get in. The warm water and sound of water hitting the shower makes you have to pee badly.