Dogs are like cats and all others that have a bond and relationship with a human being.  I see that your dog is close to you perhaps for reasons that you already take care of him or her.   They have a unique way of expressing themselves to their master or family members if they are house broken and live in the home.  My cat name Rumtum has that exact reaction when I am lying on the bed or on the couch just resting.  They are able to sense your warmth and want to cuddle.   By allowing the animal to be close to you also stregthens the bond.  Not all inidividuals find sleeping with the pets healthy as other facters go with those with their own opinion.   It is however nature's way of a human being caring for another but in this case an animal.  I really think alot and try to understand Animal Planet, or Discovery Channel series and I find that animals are great care givers themselves and are good survivers.   Nature is meant to be appreciated.  It goes along in Noah and Ark.   My family has raised animals especially rot wielers, pit bulls, chawawas, german shepards, and even picanese dogs of all size and shapes.   They are very much handy companions in their own way and can also protect you from danger.  It is the 6th sense that they have that we don't have and I thank God for giving them that gift.   Just keep caring for you dog because he/she shows their affection in return.   Bare in mind that in any relationship just like humans, disciplining them to correct an inappropriate behavior is just telling them we love them.   I love my cat, she is a senior citizen like myself.  Single still and never had the chance to find a soul mate.   No it's how you handle caring for your pet.   Because my cat Rumtum knows, when I am depressed, it never fails with her, she knows when to be by my side without me calling her.  What a gift of her 6th sense.   She is playful when she wants to be.   Show your support and take care of your animals, like humans, even the neglected ones will leave you or harm you in one way.   Take a look at the Discovery channel and Animal Planet both to remarkable television series that children must watch.  What I learn from an animal is not only demonstrated in real life on how they care for their young, but it's how they are able to survive from terrible weathers and know where to go for shelter.   There amazing and I thank God for placing his story in Noah and the Ark as for one main reason, animals were created.   Your doing much a good dog handler and remember I don't spoil mine, I just teach her and correct them when I need to