Parker just turned 1, and he was neutered at 5 months. However, he has this habit of bringing us his toys in his mouth, dropping them on our lap or near our feet, then leaping onto our arms/legs and humping us. When we try to stop him, he gets very angry and makes these loud agitated meowing noises. He'll bite us if we try to disturb him. We never let him "finish", because we find the whole thing very weird and awkward. He's neutered, so why is he acting like this? Is this a dominance thing? Why does he pair bringing us his toys with humping us right after?