The Taboo Trifecta – Freakonomics podcast:
Serial entrepreneur Miki Agrawal loves to talk about the bodily functions that make most people flinch. That’s why she’s building a business around the three P’s: periods, pee, and poop.
This is the free market at its best. Agrawal has a vision, she’s selling useful products, and she doesn’t have to ask anybody’s permission to do it.