tiredness, stress, overwork, lack of stimulation, or boredom
Hmm.. I am often tired, might be that. I'm stressed because of homework. Yeah, I work so freaking much because of homework and school. Lack of stumulation? Whats that? Yeah. Bored... Exept when new games are out, or my friends are on. =)
Hmm.. Okay. So we need extra oxygen? Where do you guys learn all this? O_o Well, thank you! =D
Looking at that wiki page I can see the best theory is obviously to help relese surfactant dipalmitoylphosphatidylcholine ftw. Or to stop your soul escaping. I hate it when I yawn because when I do so I cry randomly. Another question why do I cry when I yawn/
When your tired or bored you yawn i yawn when i work too hard or get stressed sometimes and Zega your 12! How do you not know this stuff? Hell I'm 11 and i probably know more stuff than you do...