I know some will call this "stereotyping" or profiling but you know what? Most stereotyping and profiling happens for a reason. If you like dogs and they like you and you come across a stray or someone else's dog and play with it and pet it it's all cool. BUT what if EVERY brown dog you tried to pet tried to bite you? Would you not become wary of brown dogs? Sure, there are probably some, maybe even a lot, of brown dogs that will not try to bite you but if personal experience shows you that brown dogs bite and your new girlfriend has a brown dog, you WILL approach it differently even if she tells you..."It's OK. He doesn't bite"