Defensive wounds

Unless they are 2 years old, people don't just go out and bite people so it is always troubling when I hear cases where the police arrested someone for biting the other person or worse, charge them with a crime for biting someone. Bite marks and usually scratches are defensive wounds typically in reaction to being strangled or physically restrained. I really wish that when police heard the allegation that someone bit them, they would take the time to figure out why.