I mean, there are obvious ones, but would songs like 'Butcher Pete' by Roy Brown have been censored when they came out in the 1930s? I've heard that 69 is first seen in my native French centuries ago, but would it have been understood in the 1950s with Connie Allen's 'Rocket 69'?
Perhaps I'm naive, but I just find it surprising that the lyrics are so sexually obvious, but I can't tell if its because contemporary society/dirty mind or if they would have also understood.
Especially 1930s music was infamous for sexual innuendo, especially if you look at jazz or lyrics from some of the more bawdy Broadway shows.
http://www.songlyrics.com/pal-joey/bewitched-bothered-and-bewildered-lyrics/
Bewitched, Bothered, and Bewildered is a song from the 1940 Lorenz/Hart show Pal Joey, and is sung by a rather well-sexed woman after having a romantic sexual encounter. There's little subtlety in:
When he talks, he is seeking/ Words to get off his chest/ Horizontally speaking/ He's at his very best
Vexed again/ Perplexed again/ Thank God I can't be oversexed again/ Bewitched, bothered and bewildered am I
Another prime example is the 1938 Cole Porter song "My Heart Belongs to Daddy," originally written for Mary Martin to sing, a song that is basically continuous innuendo. http://lyrics.wikia.com/wiki/Mary_Martin:My_Heart_Belongs_To_Daddy
For an even earlier example, check out Cole Porter's 1928 song "Let's Do It (Let's Fall in Love)" The act of "falling in love" is not necessarily what the lyrics imply. Here are a few verses:
The Dutch in old Amsterdam do it/ Not to mention the Finns/ Folks in Siam do it, think of Siamese twins
Electric eels, I might add do it/ Though it shocks 'em I know/ Why ask if shad do it, waiter bring me "Shad Roe"
In shallow shoals English soles do it/ Goldfish in the privacy of bowls do it/ Let's do it, let's fall in love
Another example, from Cole Porter's 1929 musical Fifty Million Frenchmen, is the song "I'm Unlucky At Gambling," which is a woman singing about her misfortunes in dating.
I took the croupier to a picture show/ I took the croupier to a picture show/ And though we snuggled close when the lights were low/ The croupier impressed me as rather slow
I said "I like John Gilbert a lot, don't you?"/ I said "I like John Gilbert a lot, don't you?"/ He didn't answer but when the show was through/ I realized that he liked John Gilbert too.
Yes, that's a (thinly-veiled) joke in a song from 1929 about a woman on a date realizing to her dismay that her date was a homosexual.