It depends on the person. A common factor that can make your body think it is hungry is lack of sleep. Because your body lacks energy, it tries to make up for the lack of sleep by increasing calorie intake.
Yes, it is well established that a lack of night time sleep will make you sleepy by afternoon. Especially if you have a full lunch
No.
yes it does
We sleep when we are tired. Likewise, we eat when we are hungry
Because it boosts your alertness and energy level.
People do not die from lack of sleep- but they DO die from lack of food.
not feeling hungry
lack of protein
Sleep more.
Yes, lack of sleep has been linked to breakouts.
No Gaara does not wear make-up, the black around his eyes are from his lack of sleep. -or maybe its to hide the bags under his eyes from lack of sleep -or maybe he was born that way from the shukaku