Secondary sexual characteristics are the first sexual characteristics of males, as opposed to the first sexual characteristics of females, which are the testicular genitalia of males and the uterus and vagina of females. In males, the secondary sexual characteristics, after puberty, are the development of the laryngeal nodes, the extra tallness of the body, and the thicker chest hair. The second sexual characteristic of women after puberty is the development of breasts, which is also a sign of female beauty. The second sexual characteristic is a very important sexual expression for both boys and girls.