Unfortunately, toddlers (not toadlers) don't know that bleach and amonia are toxic, and that colored pills are not for swallowing en masse. They do learn about some, when they survive. People's tastes are truly varied.

Some adults inject chlorine thinking it provides health benefits.

TLDR: Learning what to consume by Trial and error works for bats, but not for humans.

I was just joking about people eating bats, which kind-of made the news a few years ago...