Dogs are animals and animals can be unpredictable. This statement sets all parties up for failure. Everybody needs to respect the breed of dog you have and understand the characteristics of that breed. There is nothing to prove in this area especially when it comes to the safety of your child or their friends. It is not enough to say that children and dogs should never be left alone unsupervised. Even that statement gives a false sense that if you are in the room that nothing would happen. The truth is you need to know and understand your individual dog and manage your household accordingly.