When a bird young and free   Hangs around a certain tree   Singing serenades that tell his love is true   That's because it's the natural thing to do      And when a cat on a fence   Keeps his darling in suspense   And he's brave enough to face a well-aimed shoe   That's because it's the natural thing to do      And you know every dove   Has its heart set on love   Rabbits too, pet and pat   And there's nothin' wrong with that      When a boy such as I   Tries so hard to qualify   With a very lovely lady such as you   Can't you see it's the natural thing to do?      And then the girl she acts demure   The boy he feels proud and sure   So proud and sure that   He impulsively suggests a rendezvous fine thing   That's because it's the natural thing to do      But the girl she just won't agree   She whimpers and she simpers   And he begs on bended knee   But she runs away because she knows full well   He'll pursue the chump   That's because it's the natural thing to do      Then the boy in despair   Waves his arms, tears his hair   Stamps his feet and he acts like mad   Then you know that he's got it bad      Then the girl she oughta fall   If she's got a heart at all   She should take him in her arms   And kiss him too   Oh, oh, just the natural thing to do