A bit on the side


WOMEN are fickle—at least according to a study of how a woman’s taste in men varies across her menstrual cycle. David Perrett of the University of St Andrews in Scotland and his colleagues asked female volunteers to rate the attractiveness of computerised images of male faces. Some of the faces had been “masculinised” by giving them larger jaws and chins, while others were “feminised”, with rounder, softer features. The researchers found that when women were ovulating and therefore more likely to conceive, they were more likely to choose highly masculine faces—even if they had preferred more feminised faces when tested a week earlier (Nature, vol 399, p 741). This may indicate that women are driven to cheat on long-term partners. “Our findings don’t deny a mixed strategy,
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