My Lacy doesn't allow 'behind' the scenes sniffing. He'll flip in the air to avoid it. However, his flipping is normally considered play by the other dog. He would rather face to face greet. Then 'friendlier terms' can be discussed. If the other dog doesn't care for face to face greeting, then I won't allow them to greet.
My GSD doesn't want to make friends with other dogs. He'll ignore. Therefore, I don't allow any greetings with strange dogs. If I'm at a friend's house and we want the dogs to meet, we'll do it on a leash. The other dog will come and they'll do a shoulder to shoulder sniff, working their way back. Even after all the politically correct greetings are made, he'll ignore. He's a social snob.
Hondo Von Dopplet L Bauernhof "Hondo"- GSD
Lilie's Tug McGraw "Tug" - Golden Retriever
Maggie - Mini Dachshund (Rescue)
Lonestar Pivo - Texas Blue Lacy
Ashe - Barn Cat
Katie / APHA