The point about the sound of a smile is very interesting, its also true that humans don't usually attack with teeth, our teeth are designed only for chewing and not for attacking. This is true of most animals that are not predatory and so do not kill with their teeth, such as cows and horses who do show their teeth in non threatening ways, horses out and out laugh ("whinny") for joy showing their teeth fully. We might expect a different dynamic for predatory verses none predatory teeth. Human teeth are not the threat, they are closer to the teeth of a horse than to the teeth of a wolf , the human hand is the threat, a fist is the same as bared teeth for humans. Aggression is shown with CLENCHED teeth, a smile is NOT clenched.
Master!
The point about the sound of a smile is very interesting, its also true that humans don't usually attack with teeth, our teeth are designed only for chewing and not for attacking. This is true of most animals that are not predatory and so do not kill with their teeth, such as cows and horses who do show their teeth in non threatening ways, horses out and out laugh ("whinny") for joy showing their teeth fully. We might expect a different dynamic for predatory verses none predatory teeth. Human teeth are not the threat, they are closer to the teeth of a horse than to the teeth of a wolf , the human hand is the threat, a fist is the same as bared teeth for humans. Aggression is shown with CLENCHED teeth, a smile is NOT clenched.