So my daughter and I adopted two cats from a rescue about 3 months ago. Everything has been great with the exception of one thing...... the male we adopted randomly bites without warning. He never draws blood with it. I know he likes being petted on his own terms... However, he can come rub on you you give him a scratch and stop and he bites. Or like this morning he was laying beside me in ber and he randomly bit me in the arm.... why is he doing this I have read about over stimulation but there are times when you are not doing anything to him and he does this.