Animals and Bums

Two months ago we had plumbing problems. Plumbing problems that required a plumber to shut down both the upstais bathroom and the downstairs toilet. Of course, my newly potty trained son, Tiernan had to go pee during the toilet blackout period. Soooo... it was a relatively warm day and he is a boy, and we have pretty seculed back yard. And not wanting him to ruin his streak of not going in his pants, I allowed him to go pee in the bushes in the back. It was a one time deal, because it was an emergency.
Fast forward to yesterday, Mommy was home and playing outside with the kiddies, while Daddy, (me) ran some quick errands. During this time, Tiernan tells him mother that he has to go pee and proceeds to pee in the bushes, because Daddy lets him.
Later in the evening, Daddy is confronted by Mommy about, "Why are you letting Tiernan go pee in the damn bushes?"
Sooo... for the next twenty minutes, we had to explain to him that only animals and bums go pee outside, and that he was neither.