It depends on the situation. Cats also have a habit of humping and mounting. Just like dogs, cats don’t necessarily hump because they are trying to mate with others. I have seen neutered cats try to hump other cats and dogs.  Here are some of the reasons your cat might hump other cats or dogs: Reinforcing social ranking. - Boredom. - Excitement. - Stress and anxiety. - Medical Issues like increased testosterone level. If this is the case, you should contact a veterinarian. They may diagnose the problem and will suggest some solutions for it.