It's really up to you. If you allow it, he'll do it. Some people find it funny/entertaining, and others don't. I personally don't like it, and the few times Kaji did it I stopped him. He only ever humped my old roomie's pom, and I put a stop to that. That was 2 years ago and he hasn't done it since. He's not a humper and I'm ok with that.
