Korean guy: Learning Korean is easy.
Me: It seems tough.
Korean guy: No, it's easy. For example, issoyo (있어요) means have and opsoyo (없어요) means don't have.
Me: That's hard to remember.
Korean guy: No, it's not. If a beauty girl says to you "Do you have some time?", what do you say?
Me: Issoyo.
Korean guy: And if ugly girl says "Do you have some time?", what do you say?
Me: Opsoyo!
Korean guy: See, it's easy.