Fig 1. Four conditions were employed, as follows (clockwise from the upper left hand corner).

Disgust affects sexual arousal: Women rated 18 disgust-inducing pictures and then watched an erotic film; Sexual arousal affects disgust: Women watched the erotic film first, then rated 18 disgust-inducing pictures; Sexual arousal affects fear: Women watched the erotic film and then rated 18 fear-inducing pictures; Fear affects sexual arousal: Women rated 18 fear-inducing pictures and then watched the erotic film. The two fear conditions control for the contributions of negative valence, an attribute shared by disgust and fear.