a well-meaning education
there was a "tour of the body" programme just called "THE BODY",
featuring a suspiciously friendly uncle and his eager attempts to explain all bodily functions to the avid young viewer...
a token episode featured live papier-maché scenery of an oily forehead, with gigantic hairsacks and zits full of goo which the uncle
jumped on, bursting the gigantic-scaled zits open with squirts of fake "pus" raining everywhere (and covering the screen with mighty SPLATs

!)
another memorable episode was the one where "when mum and dad is alone in the bed, they take their clothes off (this is how they look like- big explanatory photo with arrows towards PENIS, VAGINA, BREASTS, PUBIC HAIR, etc.), and sometimes they want to make love (because they really, really care for each other, you know), so then daddy puts his penis into mummys vagina and begings to thrust and this is called (explanatory poster), and feels really, really nice- so when they do this it is possible to make babies because a little sperm cell (cue picture of sperm)... etc. etc. etc.-
but sometimes, most of the time, mum and dad don't want to make babies, they do it just for fun- BECAUSE IT FEELS REALLY, REALLY NICE

"