A fecal transplant capsule from OpenBiome. (Credit: Erik Jacobs)

Mark Smith dares you to come up with a fecal joke he hasn’t heard. It’s not your typical industry parlance, but when you’re in the business of transplanting the stuff, it helps to have a sense of humor about it. “I think we’ve gone through just about every poop pun under the sun,” says Smith, who makes a living reallocating the contents of people’s bowels.

He’s the co-founder and CEO of Massachusetts-based Finch Therapeutic