Although dogs love to be petted when they're awake, petting them while they sleep can startle them awake, and they can react aggressively. Constantly interrupting their sleep can leave them in a bad mood and at a higher risk of illness.

Believe it or not, many dogs simply crave physical affection, just like humans do. In fact, most dogs find being petted to be incredibly satisfying and pleasurable. Whether it's a gentle scratch behind the ears or full-blown belly rubs, petting just feels good to our canine companions.

Although some dogs tolerate head pats, most instinctively feel uncomfortable when a hand reaches down from above their head.