Just Like Yoga
Dogs stretch after waking from a nap or a night of sleep, but not for the reason you think. Although it is to stretch their muscles, it can also show affection and love. If you notice your pup stretching when you get home, they may not have been sleeping.
Exposing Their Belly
A dog shows respect and submissiveness when they show their bellies. This position may also be their way of showing you they want to play. Dogs will also roll onto their backs when being attacked.