i have to disagree with you on that, many untrained dogs will protect their owners,
my old dog proved himself more than enough when me and my mate got into a fight

and marley is very protective of my and wont let other people touch me generally

My old favourite is that neutering a dogs calms them down, this one really makes me cross as I have quite a few friends who insist my lurcher 'calmed down' after he was neutered and had nothing to do with the hours of training I put in.

Some very strange myths:
If you count the nipples on a male dog, that tells you how many litter mates he had.

When a dobermann matures a single giant fang grows from the roof of its mouth, it can deploy this fang at will, like a snake. This is why not many people know about it as its rarely seen phenomena.

My gran always used to tell me this and i always thought it was an old wives tale: a dog with more pink than black in its mouth is more obedient. The pink and black bit may be the other way round, can't quite remember. Could there be a hint of truth in that one?

Just remembered another funny one! A quick and easy way to bond with a dog, take a piece of white bread and put it in your armpit for an hour, then feed it to the dog. Some versions of this myth to half chew the bread instead of the armpit thing but its essentially the same

"You can never train a terrier" I wish I had a pound for everyone who came out with that stupid line!

I remember in the early 70s when there were a lot of attacks by GSDs (then called Alsations) and as a youngster, I heard so many people saying, "you can never trust an Alsation completely" I never quite worked out why, because the 1 example that I knew was a lovely chap!

My young mind was addled further, when I plucked up the courage to ask an adult why....the answer was, "they all turn eventually"

Not sure what response the Adult was expecting, but not: "they have to turn eventually - otherwise they will bump into things"

I wasn't being sarky - honest