@oldrawgabbit
A little bit of digging and I found that the Muppets or sesame Street were not the first people to do it,
It originally appeared in a steamy film about Swedish sexuality

The song originally appeared in a racy Italian film called Svezia, inferno e paradiso (Sweden: Heaven and Hell), in a scene where a bunch of Swedish models crowd into a sauna wearing little more than bath towels.

https://slate.com/culture/2011/11/mahna-mahna-how-a-ditty-from-a-soft-core-italian-movie-became-the-muppets-catchiest-tune.html
#MahnaMahna #OriginalVersion #ItalianSoftPorn