The Null Device
It emerges that the "Mahna Mahna" song, that (in)famous earworm from the Muppet Show, was originally from an Italian soft-porn exploitation film titled Sweden: Heaven and Hell:
In the tradition of the shocking, factually questionable Mondo Cane, Heaven and Hell was styled as a documentary about Scandinavian sexuality, which provided a thin veneer of respectability for its leering exploration of lesbian nightclubs and meter maids who moonlight as nude models.The song, composed by Piero Umiliani, was released as a novelty single under the title “Mah Nà Mah Nà”, and made it to number 55 on the US charts, which presumably led to a bohemian hepcat and puppeteer named Jim Henson discovering it; and the rest, as they say, is history.
Mah Nà Mah Nà was by no means the only piece of worthwhile music to emerge from the seamy European cinematic underworld. Before video came along, a lot of pornographic and exploitation productions were seen as canvases for experimentation and artistic exploration in everything from cinematography to music, which has led to highly prized soundtrack recordings from films such as Vampyros Lesbos and Die Schulmädchen Report. (After the VCR commodified porn and cut into its margins, such exploration seems to have moved to the rising genre of music videos.)