Most people are unaware that the shape and structure of their teeth can actually make them look more masculine or feminine. A fundamental difference lies in the central front teeth of men and women. These four incisors on both, the upper and lower jaws are larger and more square-shaped in men, while women tend to have rounder and smaller ones. The canines or teeth used for tearing are longer and sharper in men, while women have shorter and rounded ones.
The reason this happens is mostly caused by your genes. Masculine jawbones are normally larger as compared to feminine jawbones. Do keep in mind that every person has a unique bone structure and what works for one may not work for another.