Behold, the Power of Beets

I ate one beet at dinner three nights ago and two beets at lunch the following day, and my, uh, outputs are still beet-colored. I had a red pee yesterday at Susan's apartment and considered leaving it there as a surprise, but didn't because that's gross. Let me clarify: I would not like to come home to find Susan's pee in my toilet, no matter the color. But if I came home to find that she put, say, red food dye in my toilet water, I'd be delighted.