The research team from the University of Western Australia published a study on the relationship between bebeard and testicles.

According to a recent study, men with long hair and beards may have smaller testicles than those with less hair. This study found that human beings, as well as more than a hundred other primates, face an unsolvable evolutionary problem related to the genitals.

Research groups from the University of Western Australia, who conducted the study, said a man may look attractive or haveĀ  large genitals but rarely both.

Animals can take the effort to attract their partners with impressive manes or beard or use that energy for genital development. This means that men with bearded whiskers and long hair are more likely to have smaller testes.

For the remaining primates, this trade-off is expressed in forms such as baboon’s red buttocks or simple looks and large testicular pairs in less impressive species. Dr. Cyril Grueter, a primitive scholar and co-author of the study, said testicle size has a big difference and is related to men’s appearance. Some primates are equipped with flashy tools such as beard, mane, nose or cheeks that stand out as well as countless colors on their faces and fur.

The study of testicular size focused on more than 100 primates and discovered that there were significant differences between these species. In the smallest testes, this part is about the size of pepper while the size of the largest testicle is equal to a tennis ball. The researchers explained that those attracted to their partners with long-haired hair will not have enough energy to invest in the genitals.

They chose to study the size of primate testes because there are significant differences between different populations. According to the researchers’ guess, one of the reasons for this inconsistency is that trying to achieve both consumes too much energy.