What Do Women Want

subject had probably shifted in her chair, generating a slight pelvic contraction and jarring the plethysmograph, which could, in turn, cause a jolt in the readings and skew the overall results. Slowly, she scanned the line with all its cramped zigs and zags, searching for spots where the unusual height of a peak relative to the ridges beside it told her that arousal wasn’t at play, that an interval was irrelevant to her study. She highlighted and deleted one tiny aberrant section, then continued squinting. She would search in this way for about two hours in preparing the data of a single subject. “I’m going blind,” she said, as she stared at another suspicious crest.
    She was thrilled, though, with what her experiments were uncovering—and thrilled to belong within the “gathering critical mass,” an unprecedented female effort. The discipline of sexology, which was founded in the late nineteenth century, had always been a male domain. Even now, women made up less than a third of the membership in the field’s most eminent organization, the International Academy of Sex Research, and less than a third of the editorial board—on which Chivers served—of the Academy’s journal. So female eros hadn’t been examined with nearly as much energy as it might have been. And one of Chivers’s heroes, one of the older women in the field, Julia Heiman, the director of the Kinsey Institute at Indiana University, told me that, in addition, sexology had for many decades devoted itself more to documenting behavior than to looking into the feelings, like lust, that lie underneath. Alfred Kinsey’s work at midcentury, she said, didn’t reveal all that much about desire. He had started his career as an entomologist, cataloguing species of wasps; he was wary of delving into emotion. William Masters and Virginia Johnson, filming hundreds of subjects having sex in their lab, drew conclusions that concentrated on function rather than craving. It wasn’t until the seventies that sexologists began zeroing in on what women want rather than what women do. And then AIDS engulfed the attention of the discipline. Prevention became everything. Only in the late nineties did full-scale exploration of desire start again.
    In her new experiment, Chivers played pornographic audiotapes, instead of videos, for straight female subjects. Ever meticulous, always intent on duplicating her results from alternate angles, she wanted to know, partly, whether spoken stories would somehow have a different effect on the blood, on the mind, on the gap between plethysmograph and keypad. “You meet the real estate agent outside the building. He shows you the empty apartment. . . .” “You notice a woman wearing a clinging black dress, watching you. . . . She follows you. She closes the door and locks it. . . .” The scenes her subjects heard varied not only by whether they featured a man or a woman in the seductive role but by whether the scenario involved someone unknown, or known well as a friend, or known long as a lover. There was the female friend dripping in her bathing suit at the side of the pool. There was the male roommate; there was the female stranger in the locker room. All were depicted as physically alluring, and all the salient details were kept equivalent: the pacing of the ninety-second narratives, the abrupt hardness of the cocks, the swelling of the nipples.
    Once again, when all was analyzed, the gap was dramatic: the subjects reported being much more turned on by the scenes starring males than by those with females; the plethysmograph contradicted them. Chivers was pleased by the confirmation. But this time, it was something else that excited her.
    Genital blood throbbed when the tapes described X-rated episodes with female friends—but the throbbing for female strangers was twice as powerful. The broad-chested male friends were deadening; with them, vaginal pulse almost flatlined. The male strangers stirred eight times more blood.
    Chivers’s subjects maintained that the strangers aroused them least of all the men they heard about. The plethysmograph said the opposite. Longtime lovers, male or female, were edged out by the unknown men or women—even though the lovers were dreams, perfect. Sex with strangers delivered a blood storm.
    This didn’t fit well with the societal assumption that female sexuality thrives on emotional connection, on established intimacy, on feelings of safety. Instead, the erotic might