Even mythical creatures like the unicorn must go No. 2 once in a while. We imagine it’s a lot like the creatures itself — pretty, sparkly and colorful. Or, if the idea of unicorn poop makes you queasy ...

A Black Eyed Peas song is at the center of a lawsuit filed against the makers of a pooping unicorn doll for copyright infringement. There’s a lot packed into that sentence, so let’s break it down.