Is This the Only HBO Show...

I'm pretty sure "Fraggle Rock" was mostly free of nudity, profanity and sex ... though who knows for sure, since they were fraggles.

I don't think the time it was made is particularly relevant. If anything, HBO has gotten cleaner over the years. The first real HBO series, "The Hitchhiker," had plots that existed primarily for the purpose of providing at least one reason for characters to take their clothes off. And "Real Sex" was HBO's leading self-produced series for many, many years. Over time - particularly post-Sopranos - HBO has gained the ability to market shows based on quality, rather than just the presence of elements prohibited on network TV.

I think you missed Pete Conrad's outburst during the training session....

Pete definitely let a *beep* out.
The school kid was pressed up against the glass listening and I think the teacher shooed the kids away