Did you know: If you Chew Gum While Peeling Onions, you won’t Tear up or Cry?
The flavor of the chewing gum, the aroma it will give into the air, will present the scent of the onion
The reason you cry from an onion has absolutely nothing to do with the onion’s scent.
The oil in the onion evaporates and disturbs you both by agitating your eyes and by entering your nasal cavity.
There are a few ways to prevent crying from onions:
Freeze the onion
Wash the onion thoroughly after peeling (this does remove some of the flavor though)
Breathe only through your mouth
Wear swimming goggles. It’s the easiest and most consistent way to not tear up.