An important distinctive feature of pit bull terriers is the reluctance to bite people, which plays a huge role in dog fights. Trainers need to separate animals from time to time, while at the same time, with a minimum chance of harming themselves – the Pit Bull Terrier in this regard is perhaps the safest dog. Although, of course, with due perseverance, you can train it for security functions, including attacking a person (usually this is done for defense purposes).