Dogs on the Run!

OK, so I completely goofed and I didn't close my front door all the way and wouldn't you know that it would be one of my two dogs to figure it out?!  First comes a noise outside and in true dog spirit one of my dogs goes to the front door and puts his nose to the window and whoops...there he goes!!  Then the second dog follows right behind the first.  My husband hops out of bed from taking a nap and jumps in his truck after the first dog (which is my boy dog) and I go running after the second dog (which is my girl dog.)  The girl is pretty good about coming to me but the boy will only jump in the car and go "bye, bye."  What is it about the sense of getting out of the house and just running with air whipping in their ears that is so fun?  If you take them to a dog park to run freely in a giant fenced in area they don't even get that same sense of freedom as they do when the get out of their home.  They also don't run off in that same way when they are visiting someone else's home.  I suppose every now and then even a dog needs a little freedom the same way we do.  Fortunately, my dogs don't take too much time to have their brief run with freedom.  People are another story though; we need to be able to run for what may sometimes be years or only minutes; but for whatever we need that rush of freedom for, I can only hope we do the same as my dogs and return home quickly so that we don't worry our loved ones for very long either.