How the Joy of Sex was illustrated
By Cordelia Hebblethwaite BBC

"There was some difficulty finding a workable Plan B. As the project approached a dead-end, it was the book's other illustrator, Charles Raymond - responsible for the colour artwork - who came to the rescue. He volunteered to do the modelling himself, with his German wife, Edeltraud.

Chris Foss has not looked at the original black and white illustrations he did for the book for almost 30 years. Snapping open a sturdy little grey suitcase, he starts to root through.
What does he attribute the book's success to?
He stops and lingers on an image of Charles and Edeltraud, stretched out post-coitally on a rug.
"That's very tender isn't it? They are obviously having a relationship. You can just tell by the way her body lies."
He pauses for a moment. "I think the fact that they were in love had something to do with it."