The ability to taste bitter flavors probably didn't evolve as a self-defense mechanism

One of my friends in high school actually ate an entire houseplant without ever questioning whether it might be toxic (I do believe drugs were involved here). Luckily for her it was Chlorophytum Comosum, and apparently those aren’t poisonous.

(And no, friend here really is not a stand in for “me” I swear. I ate the rhubarb leaf, but not the spider plant. I did so of seemingly sound mind, and while sober… which may actually be more stupid. It wasn’t very good.)