I can't tell if this is a serious comment or not, but if you're being serious this is horrible advice. Some dogs bites are strong enough to crush bones, and they aren't even 100 pounds. You want to willingly give them a limb so they can actually snap it in half?

Sure, if you're fighting a 50 pound Australian Shepherd, have at it. If you're fighting a 150 pound German Shepherd, you're going to die.

yeah I've seen a chessie crush a deer's skull in his mouth, seemed pretty casual for him too. I'm certainly not gonna try this with any guard breeds.

A Neapolitan mastiff I lived with was swimming next to me, he wasn’t super comfortable in water and as we were swimming he bit into my forearm and hit bone.

He didn’t mean it at all. I don’t even think he knew it happened. He was pretty dumb, but that is beside the point.

OP’s advice isn’t actually awful. If I actually had to fight Ben Dog, I would have no option but to go into the mouth. Same for grizzlies. But.... I would not want to do this and am certain I would take a lot of damage.

This would be a case where the only way to win would be to avoid.

I'm not sure that plunging my arm down its throat and choking it with my fist would be my first instinct if I were attacked by a dog :)

Amen, brother! But that's why you have to practice, practice, practice! Hit the dojo! Hard to find dogs, bears or sharks willing to spar though! Maybe a rubber bear?

This is the weirdest comment I’ve ever read on HN!

Never before have I heard "reach into an animal and grab its lungs from the inside" as a defense strategy. That's a new one.

As poorly conceived as it sounds. It’s not wrong. It’s the same advice for grizzly bears. You need to straight up break the animals instincts from attack to protect, and a non-armed way to go that is to attack eyes or mouth and eyes are hard to go to. Bears specifically have strong gag reflexes, IDK about dogs.

> Humans have three mouths

What?

Guessing it's a metaphor indicating that a human hand can accomplish the offensive goals of a dog's mouth, and so can the human's mouth.

I'm picturing some sort of lovecraftian horror of human/dog/multi mouth dog hybrid

I showed this to my gal pal, an animal surgeon of 12 years.

She's still laughing.

Also: How does one shove their arm down a dog's mouth if the dog's mouth is already busy biting the non-free arm?

Good advice but hard to accept and harder to practice. I always carry a pocket knife and sometimes a walking stick or umbrella - animals haven't yet figured out umbrellas.