My cat is a gay rapist.
I have two male cats, both about the same age. One is a small black cat who is afraid of everything. The other is a confident tabby ratter. The tabby will sometimes grab the black cat by the neck and mount him. The odd thing is that his dick is out and he is trying for the other cat's butt. I have read about a cat mounting another as a show of dominance and I have seen female rabbits do just that. But I don't think this is that.