Men with Deep Voices are more Fertile.

McMaster researchers, David Feinberg, assistant professor in the Department of Psychology, Neuroscience & Behaviour and his colleagues have found that men who have lower-pitched voices have more children than do men with high-pitched voices.

Their study suggests that for reproductive-minded women, mate selection favors men with low-pitched voices judging them to be more dominant, older, healthier and more masculine sounding.