Leigh Simmons

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It seems our impressions of faithfulness are distinct from our impressions of trustworthiness. shannonkringen

Women may have the edge on men at detecting unfaithfulness

Leigh Simmons, The University of Western Australia

In a study published today in the Royal Society’s journal Biology Letters, my colleagues and I ask if there is any validity in judgements of sexual faithfulness made from the faces of unfamiliar men and…
Guess what? It’s not so much size but the shape that matters. Ozchin

Seen one seen them all? More to genitalia than meets the eye

Leigh Simmons, The University of Western Australia and Paco Garcia-Gonzalez, Consejo Superior de Investigaciones Científicas (CSIC)

Why should male genitalia be so variable? This problem has puzzled evolutionary biologists for decades. Even to the experts, it can be difficult to tell closely-related species apart just by looking at…
Poor sperm quality is a characteristic common to all men, not just some. Aldo Risolvo/Flickr

Old faithful: is monogamy the root cause of male infertility?

Leigh Simmons, The University of Western Australia

Infertility plagues one in six Australian couples, and in approximately half of these cases the problem lies in poor semen quality. The discovery that a man has poor semen quality can be emotionally challenging…

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