I would say he is about 2 years. He will be all sweet, he will love on you, lay on your lap, then his pupils will get really big, he will stand up, start biting the top of my wrist, wrap his arms around my arms like he's hugging it, then starts humping my arm with his back legs. I try to push him off, I try shaking my arm, and it doesn't work. He will do it to anybody that spends more than a hour sitting in my room. How can I get him to stop?