What's weird, though, is that quite often I completely forget about that part of the world existing. Quite often I've been told that something or other has a smell and been completely astounded. (Like ants for instance )
Taste is the most sensible if you consider EVERY consequence. Dunno why smell is in the lead. It's second, but: 1) Aromatherapy 2) Imagine you as a wild animal. You'd need scent. We still do. What's the difference between a bright red metallic-scented gas and a vivid red, poisonous sugary-scented one, composed of the same elements?