There's one in the DT, Joe. I searched [ain't no doctor] and got If the River Were Whiskey.
Might be more. Seems like I remember a trade song, that plugs in tons of different professions, each with a double entendre on the end (ain't no mailman; ain't no mailman's son, but I can put it in the box till the mailman comes) and the like. Might be another version of Hesitation Blues. That sounds right.
Blessings
Barbara