The linked thread from last night convinced me to get CB's opinion/suggestions.

I would be happy if my 4 year old would go pee outside like the thread talked about. Last week he started peeing on the floor in the house. I've seen puddles in the closet, bedroom floor, bathtub, and even the trash can. He's almost 5. Short of literally smacking sense into him, how can I get him to stop?

He's third of four, and going through a stubborn rebellious phase right now as well.