Ok, I'm sorry if this seems like a silly question...but here goes!

My puppy is potty trained now, and he can hold it in for over 3 hours, for sure.

But one day I went to a psychiatry appointment and came back, to find that he had dragged a blanket onto the floor and peed on it! I was gone for exactly 3 hours. My question is: Did he REALLY have to pee, or did he pee out of spite because I was gone? I know he HATES it when I leave (as I'm sure all dogs hate it when their owners leave!)

What do you guys think?