What’s so great about hanging your head out of a car window? (Credit: Shutterstock)

If happiness were a picture, there’s a pretty good chance it would be a dog with its head sticking out of a car window.

It seems few pups can resist a breeze running through their fur and their ears flapping in the wind as their owner cruises into the sunset. And based on those wind-whipped grins, dogs seem to wholeheartedly enjoy this simple pleasure. 

But you have to admit, seeing a dog zoom by while