Puppies and kittens have to be housebroken, taught to fetch and not to destroy mama's new shoes. Flowers just sit there with their feet wet looking good for days and weeks. Most orchids will last for months and then re-bloom next year. Flowers are the number one gift in the civilized world. It's because they are not too expensive, are not fattening and will not create a liver problem.
Flowers are a symbol of love or affection or thanks or whatever the card says.
Fields of wild flowers are a wonder to behold. Texas highways are often in full bloom, thanks to Lady Bird Johnson. Northern California hillsides are ablaze with golden poppies in the Spring. The desert cacti surprise us with multi-hued blossoms amid their prickly spines. Russian students put flowers in soldiers' gun barrels in peaceful pursuit of love not war.