From The Department of I Had No Idea

I could smell candles in my dream. I didn’t know you could have smell recall in your dream. HOW IS THAT EVEN POSSIBLE??? How can you smell something that isn’t there? I realize the likely response to that question is something along the lines of "Same way you can see things that aren't there." But I think it makes more sense that we might see things in our mind's eye than we might smell them.