Going back hundreds of thousands of years, bumping uglies had to start somewhere.
What was the first sexual position? Was sex even for pleasure at this stage of evolution?
On today's episode we're going right the way back to the beginning, and talking to Professor John Long, the palaeontologist and author who discovered the fossils which showed us that copulation was invented by ancient armoured fishes - a lot earlier than scientists previously thought.
Get on your scuba gear, Betwixters, we're going back millions of years to the murky origins of sex.
This episode was edited by Tom Delargy and produced by Stuart Beckwith. The senior producer was Charlotte Long.
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