It's their way of saying "hello".
to find out who the dog is xxx
no
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.)
They will do that because it is away of saying Hi.
Humans don't sniff buts only dogs do that to get to know each other.
because depending on the smell they can identify eachother
It's their from of saying 'Hello' like we shake hands
It's a way of saying hello to another dog.
Most of us have more sophisticated ways of gathering info on other people.
Dogs sniff each others butts because it is their way of saying hello
Two, one in each ear, just like humans do.
Through barking and the sense of smell.
because they are like dogs and they smell them there
they lived off of each others butt meat