[Lumen]

But you're also still on, and I think you can spend 10 mins and visit a site even in school...

Because I don't need more sleep during a day than about 2 hours. (Its currently 3 am here.) Some people are different and actually sleep or are busy. During school times then the only time I have to actual visit forums are either in classes we don't do much (which is rare) or during breaks. I don't plan on using my breaks on that though, as I need to eat and I want to talk with friends that I don't see all the time. Hence, that may be the case for others or people have different reasons.