What do planets use to download music?
Nep-tunes.
Okay, Gwen, listen up! You are a person who types things on the internet for amusement. This is a pun, which is a play on words. The joke is that "Nep-tunes" sounds like "Neptune," which is a planet. And also sounds like "tunes," which is another word for music. See? It's a word that means two things at the same time. Now, try to think a little harder before you type. Okay?