Gaydar, with Konstantin Tskhay, and Barnaby Dixson on beards. April 2013

This month, is gaydar real? Can we tell whether a person is gay or straight, or even whether they adopt particular sexual roles, purely from their facial appearance? I talk to Konstantin Tskhay to find out. I also talk to Barnaby Dixson and discover what type of facial hair is the most attractive, and whether men with bushier beards make better fathers.

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In HBO's new Liberace biopic, Behind the Candelabra, Matt Damon short circuits even the least sensitive gaydar. But does gaydar really exist? Maybe. New research by Konstantin Tskhay suggests that, not only can we tell if a person is straight or gay, we can even accurately guess their preferred sexual role.

The articles covered in the show:

Bogaert, A. F., & Liu, J. (in press). Physical size and sexual orientation: Analysis of the Chinese Health and Family Life Survey. Archives of Sexual Behavior. Read summary

Dixson, B. J., & Brooks, R. C. (in press). The role of facial hair in women's perceptions of men's attractiveness, health, masculinity and parenting abilities. Evolution and Human Behavior. Read summary

Moskowitz, D. A., Turrubiates, J., Lozano, H., & Hajek, C. (in press). Physical, behavioral, and psychological traits of gay men identifying as bears. Archives of Sexual Behavior. Read summary

Tskhay, K. O., & Rule, N. O. (in press). Accurate identification of a preference for insertive versus receptive intercourse from static facial cues of gay men. Archives of Sexual Behavior. Read summary