Hannah at This Garden Is Illegal has some, well, lesser known facts about lily of the valley:

Not quite sure why it was just nightingales in the legend as scientists actually proved that human sperm are excited by the smell of lily-of-the-valley.
You read right people, not only can sperm smell, they like the smell of
lily-of-the-valley. I don’t make this stuff up. I simply report it. You
can make the perfume decisions later.

Hit the post for even more weird lily of the valley facts.

Photo: Wikipedia