If we are to trust new research, it's enough to look at his face shape.
In particular, this is about the ratio of the width and depth of the male face, that is, the distance between the upper lip and the eyebrow.
Respondents in research with wider and longer faces and more pronounced cheekbones showed a greater sexual drive than those with smaller faces and softer contours.
Researchers say the face shape is an indicator of how hormones developed while the male was a fetus, and a wider face could be a sign that there are more testosterones, which also increases the desire for an increased number of sexual partners.
See also: IF A GUY DOES THESE THINGS, HE’S NOT A GENTLEMAN BUT A MANIPULATOR
Of course, all of this should be taken with great reserve, because this is a sample of just 500 people- we doubt that fidelity can be explained by an equation.