Why Do Dogs Sniff Private Areas?

If you’re a pet owner, you know that caring for your animal means understanding them—and that includes their sometimes puzzling behaviors. One common question is: why do dogs sniff each other’s—and even people’s—private areas?

According to a site called Master Bowie, this behavior is a form of communication. Dogs gather information and say hello through scent. They have special sweat glands called apocrine glands, which release pheromones carrying details like age, sex, mood, and health. These glands are mostly found in places like the armpits and genitals.

Since dogs can’t reach your armpits, they sniff the crotch instead!

This sniffing is their way of asking questions—like “Who are you?” and “Where do you live?” It’s similar to shaking hands in human culture. Dogs can’t speak, so sniffing is their natural way to learn about others.

If the behavior makes you uncomfortable, you can gently redirect your dog with commands like “sit” or “stay,” rewarding them with treats. That way, you help guide their curiosity in a polite way.

Remember: your dog is just trying to get to know you—and others—the best way they can.