Pokee is 6 months old male cat and neutered. I just got my Casper last week which it's a male too. Casper is about 10 weeks old. However, everytime when I put them together, Pokee would bite Casper on his neck and lick all over casper's body. Sometimes...it seems like Pokee is trying to hump Casper??? That just don't make sense to me at all. I mean Pokee is neutered like 2 months ago. Casper doesn't like the biting at all. Eventually....Casper would be in a fighting position against Pokee. Pokee is very aggressive and just won't stop chasing Casper. I really need some help.........