Why does my Siamese cat (approx 8-10 months old) suddenly turn on us with no warning? He will jump in my arms to be held then suddenly turn. Last time he left several bites on my arm before I could remove him. Another instance I was sitting at my table and he walked up, put his paws on my shoulder, sat there very contented (or so I thought) for a moment then attacked my face aggressively. I had not petted him, it was entirely instigated on his part. I want to keep him but he's attacking others in my family as well. The rest of the time he's awesome. He gets plenty of love. Thanks for the input!