I remember a comedy album as a kid with a well endowed, half undressed woman on the cover. There was a banner across her chest that said "CENSORED" and it covered all the best bits, of course. But on the album there was a parody of Goodnight Irene:

Oh, Irene I wish you were a little fish
I wish you were a bass
Then you could climb on the rocks and reefs
And slide down on your... hands and knees

Does anyone else remember that? I'd really like to find that album.