[Kenneth's Refrain:] I hear singing and there's no one there I smell blossoms and the trees are bare All day long I seem to walk on air I wonder why I wonder why I keep tossing in my sleep at night And what's more I've lost my appetite Stars that used to twinkle in the skies Are twinkling in my eyes I wonder why [Sally's Refrain (in counterpoint):] You don't need analyzing It is not so surprising That you feel very strange but nice Your heart goes pitter patter I know just what's the matter Because I've been there once or twice Put your head on my shoulder You need someone who's older A rubdown with a velvet glove There is nothing you can take To relieve that pleasant ache You're not sick You're just in love
https://primoaccordo.net/irving-berlin/i-wonder-why-youre-just-in-love.htm