
Her beaus are only rainbows
And like the rainbows, they disappear
She goes the way the wind blows
And keeps believing they're all sincere
I never take her home to mother
Somehow they always bring another
Her beaus are only rainbows
They're never real beaus somehow

Though this song is ostensibly about a woman with many (fickle) boyfriends, their lack of commitment as well as the modern association of rainbows as a LGBTQ symbol makes for an entertaining listen.
The sheet music illustration of many men hanging out in a rainbow further fits the theme!
Note how the last name of the bandleader is coincidentally "Straight".
Brunswick
English
Brunswick matrix C329-C331. Her beaus are only rainbows / Charley Straight Orchestra. 1926. In Discography of American Historical Recordings. https://adp.library.ucsb.edu/index.php/matrix/detail/2000235098/C329-C331-Her_beaus_are_only_rainbows.