It's one of the most famous poses in portrait photography. The sitter, naked astride a back to front chair engages the camera with an enigmatic eye. The chair, of course, hides the genitals of Cecil Parkinson, out of which shot the sperm that changed the history of British politics, exactly 30 years ago.
Now, the fate of a single one of those spermatozoa is celebrated in a hit musical, Cecil! with music by Andrew Lloyd Webber and a book by Simon Heffer. It tells the story of Parkinson's doomed passion for Maragret Thatcher, that resulted in a love child conceived by Mr Parkinson's then assistant Sarah Keays, who cannot be named for legal reasons.
Cecil! Is one of a string of new musicals celebrating the activities of the penises of Conservative "big beasts" including John Major.
"It was inconceivable that Mrs Thatcher could conceive a love child with any of the members of her cabinet because of her busy schedule," said Edwina Currie. That is why so many resorted to their now famous peccadillos, or, in Geoffrey Howe's case, pedalos, because of a holiday mix up. "
"Ironically, not so long after, all the remaining members of the cabinet were told they had to wear condoms at all times because of the threat of Aids. How different things would have been..." Lord Parkinson recalled in a programme note for the hit show. "I remember helping Jeffrey Archer on with his, and both of us wondering whether the Tories would ever emerge from mounting scandal. Now, thanks to Mr Coulson's iron fist in Downing Street, we can put all that behind us."