Because they were naked, he could see how little their sexual characteristics were developed.

In these cases, the male and female will be continuously assessing each other based on sexual characteristics.

This is used as a defense mechanism and a sexual characteristic.

Fashion in the 1990's has been about playing up secondary sexual characteristics on both sides.

Differences in size between sexes are also considered secondary sexual characteristics.

Different from the head hair it is therefore a secondary sexual characteristic.

Puberty is the time in which sexual and physical characteristics mature.

They may also have served as secondary sexual characteristics.

Poorly defined secondary sexual characteristics in both men and women.

It occurs at the time when the secondary sexual characteristics are just beginning to develop.