Krystal D'Costa upends our instinctual attraction to deep male voices:
There is certainly a link between testosterone and voice pitch: when testosterone levels begin to rise during puberty, it triggers changes in the larynx and in the vocal cords resulting in lower pitched voices. So deeper voices become associated with other manifestations (like facial hair) of testosterone, and consequently, perceived sexual fitness. … However, semen analysis reveals that men with deeper voices have lower scores on seven motility parameters —even when the lifestyle and environmental factors are accounted for. While men with deeper voices may have more sexual partners, they seem less prepared to pass on their genes. Researchers believe the lower sperm quality reflects a trade-off that comes with having to compete for mates: "Animals have finite resources to partition amongst reproductive activities, and the theoretical models of sperm expenditure assume a basic trade-off between male investment in attracting mates and in gaining fertilizations."
The Dish 