Humping behavior in a dog can often confuse many pet owners because the message it seems to be sending isn't always clear. Here's everything you need to know about this dog behavior. Humping Behavior In Dogs
Everyone knows how dogs reproduce, but when two male dogs show humping behavior or your dog humps someone's leg or a favorite toy, the behavior can cause a lot of embarrassment and confusion (for the people witnessing it, usually not the dog).
The truth is, dogs mount each other and hump not only for sexual reproduction. They do it to show aggression and domination, sometimes even to show submission, and other times because they may have an itch or an irritation on their genitals. Sometimes, excessive humping behavior can also signal psychological or hormonal problems in your dog.
Unless the practice is excessive, it's not usually something you should worry about. If your dog is accosting guests in your home or abusing toys or other dogs to the point where it's just too much, you have a few options to consider.
Treating Humping Behavior in Dogs
One way to curb the behavior is to spay or neuter your pet. Dogs can sometimes become hormonally imbalanced and begin to hump a lot, even females will have this humping behavior. Neutering helps the behavior decrease in about 60% of males, but that still means there are 40% or so out there who weren't helped by the procedure.
Sometimes humping continues after neutering because the dog has a memory of the pleasant 
feelings it used to cause. Even after his body has been altered, he'll keep trying to recreate that feeling he once had, almost as a habit. In this case, you can begin to train him not to hump other dogs or objects by firmly telling him "No" or keeping him away from temptation.
You can also treat problem humping with professional training sessions. If your dog is humping to establish or maintain dominance, you'll need to retrain him until he remembers that he is not the alpha dog, and that you are the leader of the pack. This will usually help him stop humping people's legs, if not other dogs.
Once in a while, medication might be suggested by your veterinarian for an excessive problem. Drugs like Prozac can help curb sexual appetite and also calm your dog down .
It's important to remember that humping behavior in your dog isn't usually a serious problem, and some stern commands and obedience training very often minimize those behaviors.
