Sex. There's a lot of it about. We talk about war, chaos and atrocities on this podcast a lot although, thankfully, few of us have first hand experience of them. Yet we rarely talk sex. Which is odd. Sex is what got us here in the first place and nearly all of us will experience it in some form through our lives. I talked to Dr Kate Lister about the ways in which society dictates how sex is culturally understood and performed have varied significantly through the ages. Dr Lister runs the brilliant digital project Whores of Yore and has just written the brilliant Curious History of Sex. We chatted about why humans are the only creatures that stigmatise particular sexual practices, and sex remains a deeply divisive issue around the world. This was a fascinating chat.