Men with long facial features and large eyes, and women with slim faces and small eyes are percieved as more promiscuous, a new study has revealed. However, this perception only rings true for men, and not for women, according to the researchers. In the study, experts in Australia asked heterosexual men and women about their levels of'sociosexuality' – the willingness to engage in sexual activity outside of a committed relationship, also known as casual sex. The participants also had their photos taken and shown to other participants of the opposite sex, so they could judge, based on looks alone, if they had an interest in sociosexuality. Men who were open to casual sex typically had longer faces, higher foreheads, longer noses and larger eyes, the team found.