A typically cheeky lyric from our Ron. Presumably this song only got onto a children's TV show because the producers hadn't listened to the lyrics. No worse than pantomime innuendo though I guess and there was and still is plenty of that every season! 😉
To be honest, these lyrics should be taught in science/biology lessons! I find the way they broach the subject to be very scientific and clinical, not remotely crude. As I said in another comment that seems to have vanished, there's something very poignant about singing this to a crowd full of children who themselves were tryouts for the human race just a short while ago. It's so cosmic this song, and the way it swirls in with the flashing lights and effects really does make it seem like Sparks are beaming down from some distant outpost of the cosmos in order to take a closer look at these creatures we call Earthlings!
Guarantee the producers didn't take a look at the lyrics - but probably thought "This is a really catchy tune - perfect for a children's programme at 5pm on a Friday Afternoon"!