onions

Shrek: Ogres are like onions.

Donkey: They stink?

Shrek: Yes. No.

Donkey: Oh, they make you cry.

Shrek: No.

Donkey: Oh, you leave em out in the sun, they get all brown, start sproutin' little white hairs.

Shrek: NO. Layers. Onions have layers. Ogres have layers. Onions have layers. You get it? We both have layers.
[sighs]

Donkey: Oh, you both have layers. Oh. You know, not everybody like onion.

Quote from the movie Shrek, 2001