You may think your dog belongs to you, but you belong to your dog, as well. That means he is going to claim you and protect you.When he’s sitting on your foot, it’s an ownership thing. If his [bottom] is on you, he’s marking your foot.
It’s not just that he wants to be close to you, he’s saying, ‘This is mine; now it smells like me, don’t go near it. He does this for three main reasons: to feel secure about his place in your life, to warn other dogs that you are spoken for and because he wants to protect you. To ensure your protection, dogs will also bark at guests, growl at other dogs when outside and pull on the leash while out for a walk. There’s a line of thinking that the dog is your scout. He sees himself as a member of the pack, and he wants to make sure everything is cool before you get ther.