What makes onions so easy to hate?

Every finicky child I’ve ever met in my lifetime wants nothing to do with onions.

I have two sisters who wouldn’t eat an onion if you paid them, regardless of the way it is prepared. My husband and my other sister will both eat things flavored like onion (for example, chip-dip or the breading off of an onion ring), but won’t eat an actual piece of onion. Heck, I only like onions when they’ve been cooked. Raw onion is definitely not my thing, though I do love them once they have been cooked.

Do you like onions? Do you know anyone that doesn’t? Is it just me, or are onions really easy to dislike for many people?