thePig's Journal: What is laziness?

I always feel sleepy and will start yawning once I start studying.
Why is it so?
Is it because, I am using my brains more when I study, and since I use it more,
my brain burns more energy. Now I need more Oxygen so I yawn.

Whn I yawn it also means my brain is tired and I need to sleep (at least hard wired
due to experience).

So I want to sleep.

Does this explain a little bit about laziness?