Jane Austen wrote a lot about sex. In Pride and Prejudice, Elizabeth Bennet says to Mr Darcy: “I am no longer surprised at your knowing only six accomplished women. I rather wonder now at your knowing any.” He replies: “Are you so severe upon your own sex, as to doubt the possibility of all this?” In Emma, Mrs Weston says to Mr Knightley: “perhaps no man can be a good judge of the comfort a woman feels in the society of one of her own sex, after being used to it all her life”. And in Sense and Sensibility, Austen…