Of all the taboo topics covered on Betwixt the Sheets, this one might make you wince the most.

But it cannot be denied that poo and our management of it through history has massively shaped human civilisation.

What are the evolutionary reasons why we're so repulsed? What would happen if you came across the Aztec poo goblin? And what does the future hold for us and our poo?

Joining us today is the marvellous Suzie Edge, author of History Stinks!: Poo Through The Ages to tell us more.

This episode was edited by Tom Delargy. The producer was Stuart Beckwith and the senior producer was Charlotte Long.

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