"The same reason that everyone else joined the Crystal Gems."

Rose rolls her eyes behind the mask, and takes it back off. "Right. Well, you know. I think I've taught you enough about human culture for today, so..." Rose tugs Peridot a bit further, and starts tying her leash to a lamp-post. "There. Try learning a bit from the other people here, alright? I'll be back a bit later."

Mostly, Rose just... really needs a little break from Peridot right about now.