When we first got out persian cat he wasn't biting, he was very playful and calm. He recently gets these mood swings were he starts biting my family and I and just making weird noises and running around the house. He's 5 months old now, there are times were he head butts me and sniffs me and licks me and then all of a sudden he starts grabbing my arm and biting my face,arms and anything he can. Im really concerned, is he sexually frustrated? what's his deal, should I get him neutered please help?