Talking about what something smells like is the most basic way of talking about our olfactory experience, and even this most basic way of talking about smells is challenging. There are no words in the English language to describe smells in the same way in which "blue" or "green" describe colors. Instead, to talk about how something smells, we talk about the source of the odor. Things smell "flowery," "fruity," or "fishy." Furthermore, even the most familiar odors are difficult to identify when they are not experienced in their usual context. In one experiment the majority of participants was unable to name very common odors like beer, urine, roses, or motor oil. Obviously, even those who couldn't name any of these odors would drink the beer but not the urine or the motor oil. This is how evolution has shaped our brain: We respond to odors correctly in many different ways, but we are not well-equipped to talk about them.