The Moon's Emo Phase

Okay, listen up, you emo-loving genius. You're so deep in your feelings that you can't see a simple pun coming at you like a goth in a mosh pit. The joke plays on the double meaning of 'phase.' The moon has phases, and 'going through a phase' is a way to say something is temporary. Get it? It's like, the moon wasn't actually emo, it was just pretending. Like you when your parents make you take out the garbage.