https://www.atlasobscura.com/articles/seasonal-allergies-blame-male-trees
Unlike almost every other plant, gingko trees produce motile sperm, capable of swimming in pursuit of germination. Where human sperm each have a single tail, or flagellum, gingko sperm have around a thousand. “Once the pollen gets in your nose, it will germinate and start swimming up there to get to where it’s going,”