Your title "Peeing in the providers shower" is misleading. It should have read "Peeing into a narrow neck bottle while in the provider's shower." The guy was considerate enough to pee into a bottle - a narrow neck bottle at that to avoid easy spillage while moving the bottle. If he was really inconsiderate, he would have just gone in the shower. For all we know, the intent could have been to pour it into the toilet. Just goes to show you how considerate men can be.
The link that cookie man provided just proves the point that men are so evolved that women just don't have the capability to appreciate men. And since the rate of evolution of men is higher than that of women, women never will be able to catch up unless they have a built in switch that triggers supersonic evolution after they actually realize the superiority of man. Until then it is just condescending "men are strange creatures, when will they ever grow up" thoughts and discussions.
So sue him for being forgetful... not for malicious intent.