You don't need a metaphysician to tell you that this is Spring and pollen is everywhere. Watery, red eyes, sneezing, coughing, stuffed sinuses……. What about cars, windows, streets covered with yellow 'dust'.
We forget that this is all about SEX!! Keeping this real for the layman–trees are 'coming' all over everyone. Airborne reproduction means that most deciduous trees produce gazillions of sperm in the form of pollen and literally try to impregnate the world.
They have no idea that 99.99% will not result in fertilizing their fellow trees of the correct species and variety. It just doesn't matter.
While we're complaining–trees are having fun. At least I hope so!