What is a hole? Where do you find holes? How are holes used?

Hole it is a empty place that people make to store stuffs and that can be very useful but also very annoying. If it is very useful it can be use as storing stuffs or put nails on it and hang stuffs, but if it is annoying it can make people fell down or make them hurt. People sometimes need to make holes even on the body because of the ill, but nobody can make holes inside the body. If I can make a whole any where I want to make a imaginary hole in my brain that I can store stuffs that was very unhappy for me.