How do you define hunger? It determines whether you should eat or otherwise!!!

[neuroleptics]

maybe i should add how does it feel like to be hungry, can you actually feel the hunger?

Hunger develops from a simple craving to a feeling of a painful void in one's stomach that is eventually coupled with fatigue.

Note: I have not personally experienced more than a day without food. (What? I was curious.) I do not know how hunger progresses after that point.

I was often asked, 'have you eaten? not yet?'
i'll reply, 'i'm not hungry'
but then, when i think back what i said, i don't really know what i say when i utter the word hungry. yes, that's what i was trying to imply.....with difficulty......how hunger progress.....if you wait until you have a painful void or a noise in your stomach....that would be a rather long wait . As for the craving of sumptuous food, well, that i can assure you that you would want to taste it even without feeling hungry

[Acsabi44]

In the human body, there are 2 factors which correlate in producing the well-known effects of hunger or being well-fed.

One is the glucose concentration receptor, which measures the amount of glucose in the blood. If this gets low, your body (and brain) "gets hungry" (shows the symptoms of hunger). This is the factor thatis primarily responsible for hunger.
The other kind is the mechanoreceptors in your stomach. They can sense the "fulness" of your stomach by sensing the tension of it. If the stomach is full, then  the receptors convey the feeling of "being full" to the brain. This is the receptor that is primarily responsible for the feeling of "being full". (antagonist with the glucose concentration receptor)

In the brain, the signals fro the two kinds of receptors are getting summed, and the result is that you are either hungry or not.

Note that you can "deceive" your brain and body, for example by drinking huge amounts of water. Your stomach will be full with water, so the feeling of hunger will go away for a while.
Same is true for eating a spoon of sugar. The glucose receptors will measure a healthy amount of sugar despite your stomach being literally empty.

[AnonymousRevival]

There are two types of hunger:
Physical Hunger & Craving Hunger

Physical hunger is when your body really NEEDS energy. Symptoms include stomachs rumbling and such.

Craving hunger is when you want to eat because you crave for something rather than really needing the energy for it.

This is why we eat slowly because otherwise we sleep. If we eat too quickly our body would have a dangerously high level of glucose, and so to counteract that, the body produces insulin. However, the body is slow in terms that when the glucose level is decreased it continues to produce insulin until it is too late, and this excess insulin causes one to sleep.

[Zam888]

Well I personally find myself eating more often out of boredom than out of actual hunger

I point to the yogurt next to my computer as evidence.