There is, in fact, an international movement actively promoting the environmental benefit of peeing in the shower. (Assuming that you're going to take a shower anyway) the savings in water resources from not separately flushing a potty are calculated in the billions of gallons annually if only a small part of the population assumes this worthy practice on a regular basis.

There has, however, been little comment on whether this practice is fully compatible with the advice of that other group advocating the "Save Water - Shower With A Friend" ideal.

John