My dad is on the case, he brought a massive bag of onions and will literally do jars of the blooming things in one go - your eyes tear up as soon as you walk in! He will also be doing some with Chilli and Peppercorns which are lovely, until you get near the bottom of the jar where the chilli is so intense that it blows your head off!!!
I dont do them anymore as i have very little eye sight. Funny enough it used to affect everyone in the family within 10 yards of me when i was peeling them but it didnt affect me. I got pleasure from doing them because all the family enjoyed them and i was like a squirrel stacking them away in the cupboards.
my son would come in the kitchen, pinch a few to eat before a meal even! ha!