>Eating peanuts will make your nose bleed.
>Drinking soda (especially dark ones) will melt your bones.

If they really believed this, it would be hard to explain all the bags of peanuts and cans of soda that are sold in convenience stores as snacks; why Coke is one of the best selling beverages in Japan, and; why peanuts are sold in a such variety as shelled, unshelled, and mixed with those rice cracker things.

>Leaving a window open while you sleep will give you a stomach ache.
>Leaving a fan on while you sleep will make you sick and may kill you.

Maybe your gf was just trying to test your mettle. I've heard that in some karate classes you are forced to train Tokyo in the middle of summer in a room with the windows and doors closed and no a/c. And in Hokkaido during the winter in a room without heating.

Did you pass the test?