article | Fun science knowledge
Whether you have a dog or not, everyone knows that dogs have a weird habit: Before mating, they will definitely smell each other's butts carefully.
Behind this seemingly embarrassing behavior, is a unique etiquette and agreement between dogs, or is there any scientific basis?
What is special about the dog's butt?
To solve this problem, Dr. George Pretty from the Moener Chemical Sensor Center in Philadelphia, USA, selected the most common coyote and dogs as research objects, and discovered the mystery by collecting and analyzing their anal secretions.
Dog's Anal glands have two "small holes" on that can directly reach the rectum. Scientists have found that these two small holes are actually two glands: "epicocrine glands" that can release exclusive odors and secrete "sebaceous glands" that make dog's fur become delicate, tender and waterproof "sebaceous glands".
Among them, the acroccone gland can release a short-chain acid substance with a odor similar to trimethylamine, which is very similar to the rotten smell of animals and plants, a bit like the smell of rotten fish .
Scientists say: The odor released by the aponeal gland of a dog can expose the dog's gender, emotions, health status, foods eaten, whether there has been mating behavior, whether there is a estrus period, and the strength of the dog. Dogs smell their butts before mating, and are actually identifying these "pheromones".
This is the same as in the blind date activities, humans should understand the other party's living habits, education, income, physical health status and various other situations in advance. "Smelling Butt" is a channel for dogs to understand and exchange information between each other and .
What does "smell ass" mean to dogs?
Dogs have a very sensitive sense of smell, which is
0,000-100,000 times that of humans . They can distinguish more than 42 million complex odors, so they can become the "right assistant" of the police force and the army.
However, the dog smells the butt, it is not the sense of smell, but the comolarant in the nasal cavity. It can specifically analyze the chemical information in the odor released by the aponeal glands, and determine whether the other party is a qualified mating object .
- judging identity:
Dogs not only have the opposite sexes to each other's butts, but also between the same sexes. This is because the dog's has weak vision . They cannot visually distinguish whether the other person is the same or the opposite sex. They can only use the sense of smell to judge the other person's gender.
Each dog has its own "pheromones", which is equivalent to the dog's "id card" . "Smelling butt" is not only a friendly way to say hello , but also can smell the other party's gender and identity, and can also avoid the situation of inbreeding .
- Judge strength and health:
Generally speaking, female dogs can smell whether their strength is strong from the pheromones of male dogs. If the smell secreted by male dogs is very strong, it means that their health is very good, their energy is strong, and their bodies are very strong, and the offspring they have nurtured will naturally be stronger in genes.
- determines whether it is in the estrus period and whether it has been mating:
Male dogs can smell from the female dog's pheromone whether it is in the estrus period and whether it has been mating.
If the female dog is not in the estrus period, it means that does not have the ability to give birth to offspring , and the male dog may give up mating;
If the female dog is found to have the smell of other mating objects, the male dog will re-select another female dog that has not had mating behavior as the mating object to reproduce offspring.
For humans, eyes and language sometimes have the ability to deceive, but for dogs, smell is the most direct expression of , it will not lie.
Therefore, dogs "sniff their butts" before mating are not just simple instinctive behavior, this is a necessary means for them to reproduce .
In addition to "smelling ass", what other weird behaviors do dogs have?
In addition to "smelling ass", dogs also have many weird and funny behaviors.
- "Smelling the Pants":
People who have walked the dog will find that sometimes the dog will chase passers-by and smell the pants, which makes the scene very awkward, making people mistakenly think that there is something strange about it.
But in fact, this is the same as smelling the butt between dogs and dogs. This is a way for dogs to express friendly greetings to humans, and they also hope to understand humans in this way, but from a human perspective, it is indeed a bit embarrassing.
- Chasing your own tail:
Sometimes dogs will chase their tails and keep spinning around, as if they want to grab their tails but can't catch them, and they will hurt themselves.
In fact, this is a way for dogs to feel bored to recreate . The owner does not let it go, nor does he walk it, and he does not accompany it. The energetic and likes to play can only use the way he plays with himself to kill time.
- hug the thighs:
Sometimes dogs suddenly hug the owner's thighs, which makes people feel helpless and funny.
This is what you need to pay attention to, because this means that the dog has entered the estrus period and his temper becomes extremely irritable. If the owner does not let him go out to find a partner, he can only hold his thighs and plays a scoundrel and asks him to go out.
Dog is the most loyal "friend" of humans . It has many weird and funny behaviors, but in the world of dogs, these are all normal things.
Dogs bring a lot of joy to humans, and we should also protect and treat them well!
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