Last year saw lots of research into low-voiced guys, with scientists finding that women are better at remembering things when they’re said in a deep, manly voice, and that women prefer deep-voiced partners. The authors of the latter study wrote, “Lower-pitched men’s voices are not only rated as more attractive, but are associated with a greater number of reported sexual partners, and greater reproductive success than are higher-pitched men’s voices.”
It appears that’s not the case: a recent study found that men with deep voices actually have lower-than-average semen quality. The study authors write,
Consistent with previous voice research, women judged lower pitched voices as more masculine and more attractive. However men with lower pitched voices did not have better semen quality. On the contrary, men whose voices were rated as more attractive tended to have lower concentrations of sperm in their ejaculate.
Scientific American speculates that a deep voice might be a symbol of sexual and social maturity: men who speak in low tones may be perceived as powerful and established.