Human females ovluate on a monthly cycle. Rabbits and many other mammals are physically induced ovulators. This means that rabbits ovulate due to a stimulus from mating. Last year we proposed that female orgasm in humans evolved from physically induced ovulation. We hypothesize that using drugs that inhibit orgasm in humans will reduce ovulation in rabbits compared to untreated females. The results of this study may have profound implications for the understanding of female sexuality.