Whether straight or gay, the women claimed almost no arousal whatsoever while staring at the bonobos. “I feel like a pioneer at the edge of a giant forest,” Chivers said, describing her ambition to understand the workings of women’s arousal and desire. “There’s a path leading in, but it isn’t much.” She sees herself, she explained, as part of an emerging “critical mass” of female sexologists starting to make their way into those woods.