I know people can think that I can't sleep because I have some kind of illness, or
I sleep very late and then my biological clock is changed, etc. But I think the main reason is that I really like thinking at night, about plans, or just imagining things that make me feel comfortable, visiting some places, doing things that I'd like to do and so on.
This is happening since I was 12 or 13 years old, now I'm 18.
I don't know, I think the night is so amazing to study or read, maybe is because the silence, the quitness make me concentrate better.