Similar. Until my early 20s I thought lactose intolerance was an unfortunate allergy of some kind. My mind was blown when I discovered the majority of humans on

Similar. Until my early 20s I thought lactose intolerance was an unfortunate allergy of some kind. My mind was blown when I discovered the majority of humans on Earth are intolerant to some degree. It often makes me wonder what other simple realities to which I am completely ignorant.