If God Made Us That Way, We'd All Be Pissin' In Our Faces

I was upstairs when I heard Jack say, "I did it!", which means poo poo in the potty. So I go downstairs and look at him when he says, "I had a little accident". His shirt was soaking wet. I asked him what was on his shirt, and he said pee pee. I asked him how it happened, he wouldn't tell me. I have a pretty good idea.

Bonus - Who knows what movie my title is from?