Playing pranks on dogs is half the fun of owning them. The old peanut butter or bubble gum trick never gets old and who doesn't love throwing twenty blankets on top of their dog and seeing how long it takes them to escape. The only problem is dogs know when they're being pranked and they always have a way of making us feel extremely guilty after the prank is over. Then we realize they have the ability to self-fellate themselves and suddenly we don't feel so bad.