The subtitles/commentary is pretty funny...the concept of "A museum of "Grossology" in order to make it less gross for kids and to show that these are all natural things...how they happen, and the importance of being able to recognise what are and are not normal bodily functions/poops etc."
"The fact that most parents don't feel comfortable talking about these things then makes kids even more interested in them (perhaps to an unnatural extent), or reluctant to talk or learn about them. To break the "taboo", and show that everyone poops, has snot etc."
I don't have time at the moment to double check, but according to the oldish dude talking, he got the idea from an American artist? Dr? Silvia Grande? or something or other...
I would've liked this when I was a kid. I was pretty ashamed of taking a dump growing up, and more recently had a girl break up with me because I didn't want to take a dump in her house so I just left and made up some excuse and took a grump down the road where nobody was :(