Why I was craving an onion, and Why it makes us cry!

I am wanting onions in everything, which is not my norm. So I did some nutrition research on this vegetable.
Onions were used by Egyptian physicians for various diseases involving the respiratory and urinary systems. The onion contains many vitamins and minerals to cleanse your body of excess mucus and destroy unwanted bacteria.
We cry our eyes out because the onion contains a sulfur compound and when we cut the skin it produces a strongly scented oil called thioproanal-s-oxide.
If you have digestive issues, it is best to cook the onion due to it being difficult to breakdown and can cause more irritation. If you can eat them raw and have no one to breathe on, go for it, the onion along with honey are two foods that can prevent the common cold.