All those plants care about is what every being cares about on the most basic genetic level: making more copies of itself. Through trial and error these plant species have found that the best way to do that is to induce animals—bees or people, it hardly matters—to spread their genes. How? By playing on the animals’ desires, conscious and otherwise. The flowers and spuds that manage to do this most effectively are the ones that get to be fruitful and multiply.