What are some words that fit together perfectly?

Poe said that “Cellar door” is the single most beautiful phrase in the English language (according to Donnie Darko, anyway). Today I found myself saying “Do you guys want some peppers and apples?” and was struck by how wonderful it felt and sounded to say “peppers and apples.”

Do you know some of these? Care to share?

Edit – Oops, just found this question. Oh well, sorry guys. I’m totally interested in your answers anyway.