Why do dogs hump the air? max would do it a lot, he would get this sort of perplexed look on his face, like when he is scratching himself and start humping the air. It seemed like he could not control it since he would start walking and it would continue. His penis would come out and as he was walking he would poke his head under and lick it until he stopped. If you told him to sit or get him exited then it stops automatically. So why on earth does he do it. my uncle said that it feels good for them to go through the motions but I don't really trust all his dog info since he believes in hitting dogs to show them that they are wrong and he is right and he will not accept any other people's ideas, he'll yell at me if I try. Anyone else have a dog that does this?