Why does my dog do that?
Why does my dog sniff visitors' crotches?
Last updated 23 September 2026 · How we write and check this
Short answer
This is simply a dog going directly to the areas of the body with the highest concentration of apocrine sweat glands, which produce the scent compounds dogs find most informative about a person's identity, health, and even hormonal state. It is embarrassing for owners but entirely normal canine information gathering, not a behavior problem to punish.
Why that area specifically
Apocrine glands, concentrated around the groin and underarms, produce a scent signature far richer in individual information than skin elsewhere on the body, and a dog's nose is built to seek out exactly that kind of concentrated data. From a dog's perspective, this is simply the fastest way to learn the most about someone new.
Why it happens more with new visitors
Unfamiliar people carry no established scent profile in a dog's memory yet, which tends to make the investigation more intense and prolonged compared with a quick greeting sniff toward someone the dog already knows well.
Managing it politely
Teaching a solid sit or hand target cue for greetings, and rewarding it generously, redirects a dog's enthusiasm toward a more socially acceptable version of the same curiosity, usually within a few weeks of consistent practice.
Key takeaways
- Dogs target the groin because it carries the richest concentration of individual scent information.
- Unfamiliar visitors get more intense investigation than people the dog already knows.
- The behavior is normal information gathering, not disobedience or dominance.
- A trained sit or hand target for greetings gives visitors a more comfortable alternative.