Title. It’s hard to open packets with 2 hands aka using your fingers even though they are grip machines. But put it in between your teeth and it’s like magic. Why oh why?
In: Other
Teeth are sharp. This means they’re better at biting into slippery stuff. Think how ice skates work. Hands and fingers are designed to get a grip on larger things, on a smaller thing like a ketchup packet they don’t have a big enough grip area and end up slipping
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