[Intro]
When the little blue bird who has never said a word starts to sing, "Spring, spring"
When the little bluebell in the bottom of the dell starts to ring, "Ding-ding"
When the little blue clerk in the middle of his work starts a tune to the moon up above
It is nature, that's all, simply telling us to fall in love

[Verse 1]
And that's why birds do it, bees do it
Even educated fleas do it

[Refrain]
Let's do it, let's fall in love

[Verse 2]
In Spain, the best upper sets do it
Lithuanians and Letts do it

[Refrain]
Let's do it, let's fall in love

[Verse 3]
The Dutch in old Amsterdam do it
Not to mention the Finns
Folks in Siam do it
Think of Siamese twins
Some Argentines without means do it
People say in Boston even beans do it
[Refrain]
Let's do it, let's fall in love

[Interlude]
Take it, Brian
Mm, mm, yeah

[Verse 4]
Electric eels, I might add, do it
Though it shocks 'em, I know
Why ask if shad do it?
Waiter, bring me shad roe
In shallow shoals, English soles do it
Goldfish in the privacy of bowls do it

[Refrain]
Let's do it, let's fall in love
Let's do it, let's fall in love