Illustration from the Joy of Sex by Chris Foss showing a couple kissing. © Chris Foss courtesy
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Joy of Sex 40 years on: The story of its illustrations

It is coming up to 40 years since the publication of The Joy of Sex, the sex manual which went on to sell more than 10 million copies around the world.

The book is perhaps best remembered for its illustrations - in particular the "man with the beard".

Chris Foss was one of the illustrators of the original 1972 book, which was considered groundbreaking at the time.

"We were a bit nervous when we took this on," he told the BBC World Service programme Witness.

Witness will be broadcast on BBC World Service on Wednesday 26 October. You can download a podcast of the programme or browse the archive.