Most of us have more sophisticated ways of gathering info on other people.
When dogs sniff each others butts it's like when we shake hands. It's a greeting. (Don't go around sniffing people's butts.)
Other dogs butts
because they want ot at there poopy
Cause its fun for them and its a way 2 say ello XD
Dogs sniff each others butts because it is their way of saying hello
sure i do sometimes when my friend or a stranger comes over
They sniff each others butts, like other dogs.
Fart may smell good if a person likes that dirty smell. But dogs really like smells that smell bad to us. That's how they get to know each other,by sniffing butts.
Dogs Like/sniff other dog butts to get information about the dog. It is a form of communitcating.
they can learn more about them avoiding the bad smell
They will do that because it is away of saying Hi.
dogs usually do this because when greeting other dogs they smell their butts and are going to go around you to greet you too