Is smelling ass "sexually suggestive"?

Those of you who have dogs, have you ever noticed that dogs will smell each other's ass when they see the same kind? You know that the human nose has 5 million olfactory receptors, but the dog's nose has 150 million. If converted into sensitivity, the sense of smell of a dog is about 100,000 times higher than that of a human. In addition, about one-third of the dog's brain is used to detect and recognize odors, while humans only use 5% of the brain to process smell.

There is a special structure inside the dog’s nasal cavity that leads to the top of the mouth behind the upper incisors, called the vomeronasal organ, also known as the Jacobson’s organ. The nerves of the vomeronasal organ lead directly to the brain. Unlike the nerves in the olfactory tissue of the nose, the vomeronasal organ does not respond to ordinary smells, but is responsible for chemical communication.


Inside the dog’s rectum, there are two small sacs called anal glands. They secrete chemicals into the rectum through a pair of tiny openings. When the dog defecates, the rectal sphincter contracts and the glands empty and release the smell into the air. Every dog ​​has a unique smell, and dogs can quickly determine whether they have seen it before. The smell from the anal area is the unique way that dogs recognize each other.

In addition to processing chemical information communication, the vomeronasal organ also communicates with the part of the brain responsible for mating information. By identifying pheromones, male and female dogs can know whether the opposite sex is suitable for reproduction. In addition, vomeronasal organs provide newborn puppies with the sense of smell needed to find their mother's milk source, allowing puppies to recognize their mother from other mammals.


Phromomone plays an important role in olfactory communication. It can cause specific behaviors or emotional responses, including sexual behaviors, aggressiveness, fear-related behaviors, and avoidance responses. Pheromone is a chemical substance produced by animals that can stimulate behavioral responses of other same species. In addition to being secreted by glands (including the anal sac), pheromone is also contained in saliva, feces and urine. Since the pheromone is only available in certain species, humans cannot detect the dog's pheromone.