Man to Dog: "Hey there little fellow...you sure are cute! We're gonna play a game!!"
Dog to self: "Oh goody, I love games. I hope he has a frisbee!"
Dog to self: "Uh...hey wait...why is he taking his clothes off?"
Man to Dog: "Now I'm just gonna take off my pants...and then I'm gonna...OOOOWWWWW!!!!"
Moral of the Story: Any game you play with a dog that requires you to take your pants off is probably going to turn out poorly in one way or another.