A full-blown history of sperm can’t be too long in the coming given the current academic vogue for studies of the body, and the huge spurt of curiosity prompted a few years ago by the appearance of a couple of tell-tale stains on the dress of a White House intern. It is possible the subject (or the object) first came into its own as a more than private matter when, nearly a hundred years ago, Lytton Strachey spotted a similar stain on the dress of his just-married friend Vanessa Bell and dared to name it in the mixed company of his assembled friends, the legendary Bloomsbury group in its embryonic days. ‘Semen?’ he enquired, with forensic candour, and forever after, so the legend goes, the group would never recoil from calling a sperm a sperm. ‘With that one word all barriers of reticence and reserve went down … Sex permeated our conversation. The word bugger was never far from our lips.’ So recalled Vanessa’s sister, Virginia, about a decade and a half later, when she had long since become the wife of Leonard Woolf and was already on the way to becoming one of the twentieth century’s most famous novelists and pin-up feminists.