Why does my dog sniff other dogs’ butts?

Why do dog’s sniff each others butts? It is a normal greeting for dogs to sniff each others butts, that is where they get the good information from! It is an important form of communication between dogs, from telling each other where they have been, what their mood is like and if they have meet before. Although it can be a little bit awkward for the owner, rest assured it is perfectly normal!