Much like all animals, dogs have deeply ingrained instincts that have remained even long after dogs became domesticated.
In the wild, it’s normal for wolves and wild dogs who live in packs to assert dominance over one another.
When there is more than one dog in your household, it’s normal for one to try to assert their dominance by lying on the weaker dog.
You may have noticed your precious pooch brushing up on things like the side of the couch, another dog, or even you. This is a classic display of their unique pack characteristics.
If your pup has made you their pillow, then it’s helpful to establish when the habit began. If they’ve been doing it since they were a puppy then the behavior will be a little more solidified.