Nothing compares to the love of a pet.  If you have never experienced true unconditional love, chances are you don't have a dog.  I know that everytime I open the door to my house, if my dog is home, he is going to be the first to greet me there.  He just loves to see me.  That's something that you can't get just anywhere.  Check out how this dog reacts when its "mom" returns from Afganistan.