Why do dogs sniff their buttocks at each other?

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This week, a question we don't necessarily ask our bio teacher: Why do dogs sniff each other's buttocks?

Yes why ?

Dogs engage in this surprising practice for humans, who are not used to this kind of civility, in order to obtain crucial information about their comrades by smell: sex, diet, emotional state.

They get all of this information simply by sniffing the chemicals in the secretions released by the glands near the anus of their fellows.

The American doctor George Preti was the first in 1975 to take an interest in this question.

He thus realized that the anal glands of the dog secreted chemicals apart, allowing each animal to be identified.

Thus, dogs collect much more information about their fellows by sniffing their behinds rather than smelling them in the muzzle.

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