It is natural for dogs to like to rub their necks against smelly things, because dogs identify them through smell. After rubbing against smelly things, their own smell will be better, unique and richer, and it can also make themselves feel better. Be more distinctive and attract other dogs. If you want to avoid this kind of behavior in your dog, it is best not to take your dog to dirty and smelly places. If your dog keeps smelling in a place, it is best to take your dog away immediately.