Dogs don't worry about germs. Dogs don't want to know about every other dog you ever had. You never have to wait for a dog. They're ready to go 24 hours a day. Dogs don't borrow your shirts.
Dogs enjoy heavy petting in public.
Dogs never want foot-rubs. Dogs find you amusing when you're drunk. Woman who goes to man's apartment for snack, gets titbit. Man who lay woman on ground, get peace on earth. Man who gets kicked in testicles, left holding the bag.