Listen Baby!

So I guess you can leave the tape measure home for your next date. But you better be all ears.

Voice attractiveness predicted promiscuity in women better than did their waist-to-hip ratio, Hughes and her colleagues report in the September issue of Evolution and Human Behavior. Among men, however, the shoulder-to-hip ratio was a better predictor of promiscuity.

That said, not all women with attractive voices are promiscuous, but "promiscuous females tend to have more attractive voices," co-author Dr. Gordon G. Gallup Jr., of the University at Albany, State University of New York, told Reuters Health.

Women with the most attractive voices, according to opposite sex raters, tended to have smaller waists relative to their hips, whereas men whose voices were rated as more attractive -- regardless of the sex of the rater -- tended to have broader shoulders and narrower hips.