Thanks, you guys. I almost feel like I am admitting I'm an abuser, claiming that I keep "accidentally" hitting Thor in the face. But I swear, it really is an accident!
Also, on the hump thing, sorry, didn't mean to disturb anyone! I was really just picturing someone say, "Sheesh, my dog is sooooooooooo sensitive about every little thing I do when we play. Lighten up, dog!"