P&G started using FeClone in 1994 (until then the company used mixtures made from dog food), and for a while, it was an all-purpose ersatz effluence. But it didn't interact with skin the way real poop does—it feels more like sticky clay, as you can see in the video above. So, in 2010, the company started working on an "artificial BM" that has the same surface energy, fluid dynamics, and adhesion to human skin as the real stuff. The result is made of food-grade ingredients and even comes in a trio of textures, from diarrhea to constipation. It's got everything but the smell. I got to play with some of it, and I can say it's realistic enough that doing a wipe test (which involves squirting a little turd into a "butt" created by squishing the crook of your knee or elbow shut) in front of strangers felt very gross.