When the little bluebird who has never said a word, starts to sing: spring When the little blue bell at the bottom of a dell, starts to ring: ding-dong, ding-dong When the little blue clerk in the middle of his work, starts a tune to the moon up above It is nature that is all, simply telling us to fall in love And that's why birds do it, bees do it, even educated fleas do it Let's do it, let's fall in love Cold Cape Cod clams against their wish, do it, even lazy jellyfish do it Let's do it, let's fall in love I've heard that lizards and frogs do it, lyin' on a rock They say that roosters do it, with a doodle and cock Some Argentines without means do it, I hear even Boston beans do it Let's do it, let's fall in love When the little bluebird who has never said a word When the little blue bell at the bottom of a dell When the little blue clerk in the middle of his work The most refined ladybugs do it, when a gentlemen calls Moths in your rugs they do it, what's the use of mothballs? The chimpanzees in the zoos do it; some courageous kangaroos do it Let's do it, let's fall in love I'm sure sometimes on the sly you do it maybe even you and I might do it Let's do it, let's fall in love