Dogs do not show physical signs of estrus like humans, such as menstrual cycles or swelling of their reproductive organs. They do not physically show signs of being in heat, but they may show strong affection for their owners or other dogs. The behavior of cuddling can stem from several reasons: Material reward - The dog may gain pleasure from exposure to the owner's hormones, such as reproductive hormones. When it hugs its owner, it may feel happy and receive a material reward.
Social behavior - Dogs are social animals and they need to interact with other animals and humans to satisfy their physical and mental needs. Holding an owner can sometimes be a social behavior that makes the dog feel close, warm, and safe. Genetic influence - A dog's behavior and personality are often influenced by his or her genes. Some dog breeds are more likely to be possessive and dependent, which may cause them to be closer to their owners and show more affection. Regardless of what causes a dog to cling to its owner, owners should pay attention to their pet's behavior and ensure they receive adequate love and attention, as well as provide appropriate training and behavioral guidance.