Although women find men with low voices more attractive, recent studies show that it is a higher voice that translates into a greater likelihood of reproductive success, reports PLoS One.
Research by a team of evolutionary biologists at the University of Western Australia suggests a low voice is associated with fewer sperm counts in semen.
Australians asked 30 young women to rate the masculinity and attractiveness of voices belonging to 54 heterosexual men aged 18 to 32 by listening to the tapes. In line with the initial assumption, the vast majority of women preferred lower voices.
Then, the researchers analyzed the sperm of the studied men in terms of the mobility and quality of sperm and their quantity in the sperm. It turned out that the sperm count in the ejaculate with lower voices was lower than in the men with higher voices, although it was within the normal range for all of them.
This type of exchange for something may be, according to scientists, an idea of evolution to level the playing field between men in eternal rivalry. Low voice is associated with high testosterone levels and is usually associated with success or domination. Even though testosterone has an effect on sperm production, too high a level of this hormone can have a negative effect on its production. Gentlemen with a higher voice, although less appreciated by women, in turn, give a greater chance of fertilization.