OK...so Tino was neutered right at six months, and before this he did "hump", but only a certain doll that he had. So, three years later, he still humps, but only one doll. We bought him a doll at babies'r'us and this is his girlfriend. He has never attempted to hump another dog, in fact when Lola was in heat, he stayed as far away from her as possible!!! But, without fail, he will pull his doll out, do his business with her, and then kiss her when he is done, or better yet, he snuggles with her...putting her in one of his doggie beds.
So, I am quite sure this is not a dominance thing, and personally I think it is kind of adorable how chivalrous he is with her
Ha! ha!