[toast]

If you have to eat somebody’s poop to catch something, I don’t know if that classifies as contagious.

[gleeaikin]

You don’t have to eat poop to get the microbes. After all, producers do fine getting the probiotic organisms into our yogurt products. Will they develop a product to introduce the “skinny” microbes??

[Founding Nephew]

If you have to eat somebody’s poop to catch something, I don’t know if that classifies as contagious.

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I assumed the point was that the calories must go somewhere, and what isn’t absorbed must be excreted, so skinny people’s poop must contain some caloric nutrients.