The song "How Long Has It Been Going On" was in "Funny Face"
and "Rosalie". This song was published October, 1927. Introduced
by Stanley Ridges (Original Peter) and AdeleAstaire (Frankie)
during the tryout. It was the second number in Act II. Replaced
before the New York opening with "He Loves & She Loves". With
a slightly revised lyric, introduced by Bobby Arnst (Mary) in
Rosalie (1928). Here are the 1928 lyrics:

Track Title: How Long Has This Been Going On?

Album Title: George and Ira Gershwin Songbook, disc 10
Prime Artist: Ella Fitzgerald
Arranger: Nelson Riddle
Lyrics by: Ira Gershwin (b. Israel Gershvin)

Music by: George Gershwin (b. Jacob Gershvin)
Producer: Norman Granz
Orchestra: Nelson Riddle
From the Show: Rosalie 1928 (S)

Lyrics:
'Neath the stars, at bazaars
Often I've had to caress men
Five or ten, dollars then, I'd collect from all those yes-men
Don't be sad, I must add, that they meant no more than chess-men

Darling, can't you see?
'Twas for charity?
Though these lips have made slips, it was never really serious
Who'd have thought, I'd be brought to a state that's so delirious?

I could cry salty tears
Where have I been all these years?
Little wow, tell me now
How long has this been goin' on?

There were chills up my spine
And some thrills I can't define
Listen sweet, I repeat
How long has this been goin' on?

Oh, I feel that I could melt
Into heaven I'm hurled
I know how Columbus felt
Finding another world

Kiss me once, then once more
What a dunce I was before
What a break, for heaven's sake
How long has this been goin' on?

(spoken)
Kiss me twice, once more, thrice, make it four

What a break, for heaven's sake
How long has this been goin' on?

This is a great site for lots of lyrics:
Validated / Transcribed by Todd Peach
www.thepeaches.com/music/