Possibly the most incredible thing I’ve ever seen.
Lignin, the stuff that prevents all trees from adopting the weeping habit, is a polymer made up of units that are closely related to vanillin. When made into paper and stored for years, it breaks down and smells good. Which is how divine providence has arranged for secondhand bookstores to smell like good quality vanilla absolute, subliminally stoking a hunger for knowledge in all of us.
Thanks, boyfriend. :]
Well I had to do it before some other boy bought you one and then you had to go off and marry him ;)