Why do pugs have hairless armpits?

Pugs don't actually have hairless armpits. They have folds of skin in their armpits and groin areas, which can sometimes appear hairless because the hair is very fine and sparse.

Here's why pugs have these folds:

* Genetics: Pugs are a brachycephalic breed, meaning they have a shortened skull. This genetic trait also influences the development of their skin folds.

* Breed Standard: Unfortunately, some breeders have bred for exaggerated skin folds, which has become a breed standard for pugs. This can lead to health issues, however.

* Skin Sensitivity: Pugs have sensitive skin, and the folds can trap moisture and bacteria, leading to skin infections and irritation.

It's important to note that while these skin folds may appear hairless, they are not actually without hair. They require regular cleaning and care to prevent skin problems.