Department of Newfangled Etiquette

In Brazil, where they have always been progressive about the human body (behold their beachwear) , if not about anything else, there is an ad campaign encouraging people to pee in the shower in order to conserve water.
I have always found peeing in the shower a little gross, but leave it to the British to come up with very sensible rules in case you are feeling virtuous and want to do your part for the environment as you bathe.