A mystery chemical that young women deploy as a sex attractant pheromone seems to work for post-menopausal women too.

Joan Friebely of Harvard University, US, and Susan Rako, a private physician in Newton, Massachusetts, US, have studied 44 post-menopausal women. Half added Athena Pheromone 10:13, originally isolated from a woman’s armpit sweat, to their perfume while half added a dummy compound. Neither the women nor the researchers knew who was in each group until the results were in.

In diaries kept by the women for six weeks, 41% of pheromone users reported more petting, kissing and affection with partners compared with 14% receiving the placebo. Overall, 68% of pheromone users reported increases in at least one of four “intimate socio-sexual behaviours” such as formal dates and sex, as against 41% on the placebo…