I have just been to an event at which Allen Jones was encouraged – and expected – to talk about sex in art, his own and Rubens.   He played the discussion with a completely straight bat, and it was hard for him to be drawn.   The most memorable part was irrelevant to sex, in which he compared the understanding of painting to the appreciation of skills in tap dancing:  you need a culture of skills to enable the painting of fur in Rubens.