[It should be easy, in theory, but in reality, it's not. It's like trying to describe colors to a blind person.]

I suppose it's as if...well, when you're hungry, you feel like you need something, a persistent need that begins small grows stronger over time. Eating satisfies that missing need.

When humans eat something they enjoy, it brings them a happy feeling, like they're doing something fun. Conversely, when it's something they don't like, it feels like work or a chore, something you must force yourself to do.