For those of you who don't know, let me explain what the male orgasm is like. It starts with an irritable sensation in our testicles and the end of our penis. W.H. Auden memorably called this “the intolerable neural itch”. Try to analyse the “itch” and it soon becomes apparent that it consists of little more than a large body of semen hollering to get out and go swimming as fast as possible. The mechanism by which this cargo of gunge will be released is as crudely sensitive as it is simple. It is so eager to go that, often, especially when we are young and eager, it will happen before we have even got our trousers off. But whether our sperm makes its exit in that undignified manner, or as a result of well done sex, or badly done sex, or, indeed, in the course of a good solo session, the sensation is identical. There is a slight, sweet/sour twitch from the prostate gland; a rather pleasant muscular gurgle from the testicles, followed within nanoseconds by a reasonably satisfying liquid rush the length of the old John Thomas; then, a further fraction of a second later, a moderately agreeable liquid awareness around the tip. And that, other than a few moments in a lifetime when there may be an extra fusillade within the same orgasm (typically, when we have avoided ejaculation for a lengthy period), is it. There follows a brief spell when we feel content and sleepy, and our prostate (if we are aware of its existence, which most of us aren’t, until it starts to go wrong in our forties) aches in quite a nice way.