I'm thinking of peeing in the gym shower while no one is looking.
Why would you pee in the gym shower?
I don't know, but I can see myself doing it in the future.
You shouldn't pee in any shower, but especially not a public one. Think about all the people who will have to step in it. Don't do that to them!
It's cool, I'll stop right after the first time.
Don't do it one time. Just use the toilet before showering.