Not talking about the bacteria in the product, I'm talking about the faecal bacteria (your own personal gut microbes) that are still stuck to the skin afterward

Not talking about the bacteria in the product, I'm talking about the faecal bacteria (your own personal gut microbes) that are still stuck to the skin afterwards due to not using a surfactant-based washing product. See https://news.ycombinator.com/item?id=7785997 https://news.ycombinator.com/item?id=7785997 further down the thread.