Even if women do not admit or realize it, they are turned on by scenes of a pronounced sexual nature involving naked homo- and heterosexuals and even mating primates.
Meredith Chivers, a psychologist at the University of Northwestern (USA), suggested that heterosexual men and women watch episodes from erotic films. The sensors recorded the physiological and emotional reactions of the subjects. Although the women said that scenes involving lesbians or primates did not turn them on at all, their physiology indicated otherwise. But men really most often unambiguously reacted precisely to the opposite sex.