|The stuff I'm sampling comes in a bottle
Scent is very evocative for fixing memories, which is why writers like to use it. And it's not just heroines, of course. Describing how the hero smells is practically obligatory. (We won't mention that this also provides an opportunity to study the publicity for fragrances promoted by the likes of Jonny Depp, Simon Baker, Gerard Butler ... Just for research purposes, of course.)
The heroine I have been working with most recently (although not lately) started me on the idea. While the book is rooted in the tragic events of one night, the main action takes place 15 years later. I was thinking how much the heroine would have changed in that time and the idea of what perfume she might now wear was something that occurred to me.
And, of course, the effect this might have on the hero, and the implications of change and the passage of time. It's helping with plotting the layers of the story and the emotions that the hero in particular is feeling.
All from a small, if expensive, bottle ...