In the UK people are prepared to spend big money spicing up their sex lives. Once seen as the haunt of furtive men in grubby raincoats, sex shops have moved onto the high street and found a new market among younger women. As part of Hardtalk's business series, Stephen Sackur talks to Jacquline Gold, chief executive of the Ann Summers chain. She may have given the sex industry a dose of commercial Viagra but is she also contributing to the exploitation of women?