As humans we are constantly being told what is bad for us. Don't drink this. Don't eat that. We all know that smoking causes lung cancer, and that fatty and processed foods are nearly poisonous to your body. Drugs? Fuhgeddabout it. We talk a lot less about the stuff that seems completely harmless but could actually really mess us up. Redditor u/Sealedbox recently asked the r/AskReddit community to share situations, objects - and even animals - that fall into this category. They came through wit…