I am fascinated to have just stumbled across one Ida Craddock on the web; a Victorian 'sexual mystic' who believed in straightforward advice on sexual matters. A sample of her wisdom:
Well, I think that the very first thing for you to bear in mind is that, inasmuch as Nature has so arranged sex that the man is always ready (as a rule) for intercourse, whereas the woman is not, it is most unwise for the man to precipitate matters by exhibiting desire for genital contact when the woman is not yet aroused. You should remember that that organ of which you are, justly, so proud, is not possessed by a woman, and that she is utterly ignorant of its functions, practically, until she has experienced sexual contact; and that it is, to her who is not desirous of such contact, something of a monstrosity. Even when a woman has already had pleasurable experience of genital contact, she requires each time to be aroused amorously, before that organ, in its state of activity, can become attractive. For a man to exhibit, to even an experienced wife, his organ ready for action when she herself is not amorously aroused, is, as a rule, not sexually attractive to her; on the contrary, it is often sexually repulsive, and at times out and out disgusting to her. Every woman of experience knows that, when she is ready, she can cause the man to become sexually active fast enough.
It is remarkable that, for all its quaint language, this still seems a case of plain-speaking, some hundred years on. I'm not sure any UK writers were quite so frank; but I'm no expert ... if anyone would like to correct me, please write in!