An old song written, after the intro, entirely in advertising slogans that were common in 1929, and used on highway billboards all across the U.S. I had to look them up to satisfy my curiosity, so what I discovered is listed below. The only one I knew for certain was "say it with flowers" for FTD, except back in 1929 they weren't FTD yet.
it peps you up - Used by both the tea industry to advertise tea as well as by Pepsi-Cola to advertise Pepsi.
there's a reason - Grape Nuts cereal
eventually, why not now? - Gold Medal Flour
keep that schoolgirl complexion - Palmolive bath soap
with the milk from contented cows - Carnation Condensed Milk
the flavor lasts - Wrigley's chewing gum
it's toasted - Lucky Strike cigarettes
they're mild and yet they satisfy - Chesterfield cigarettes
now you just know that she wears them - McCallum Silk Hosiery
your dealer will tell you why - Used for numerous and varied ads in many different industries.
goodnight, it's time to retire - Fisk Rubber Company (automotive tires)
with skin that you love to touch - Woodbury's Facial Soap
good for that tired feeling - a common claim of many "patent medicines"
go and ask dad, he knows so much - actually "ask Dad, he knows" - Sweet Caporal cigarettes
they have the best show in town - unknown, probably used by every traveling vaudeville troupe
eat more bread - Fleischmann's Yeast
say it with flowers - Florists' Telegraph Delivery Association, later to become FTD Flowers.
oh, Henry - candy bar
if nature won't, pluto will - actual slogan "when nature won't, Pluto will" Pluto laxative mineral water