Robt Uresti
Robt Uresti voted up John McCann's answer

A defined jaw is an indication of a body well sculpted by testosterone and free of genetic insults.

Women shown pictures of men during their menses will find that sort of high testosterone indicator, defined jaws among them, more attractive than other pictures of men.

You may thank natural selection for women wanting two types of … Read more

Robt Uresti
Robt Uresti voted up Veronica Dultry's answer

Back in the cave man days a strong jaw was an indicator of an alpha male. We have a natural attraction to said males to ensure the survival of our species.