Secondary sex characteristics refers to any sex-specific physical characteristic that is not directly involved or necessary in sexual reproduction, like pubic hair and breasts, in females.
Increased testosterone also leads to the development of secondary sex characteristics like growth of facial and pubic hair, increased height and muscle mass, and a deepening of the voice.
But despite becoming mostly bare, we retained plentiful hair in our armpits and crotches becoming the only mammalian species in the world to have long, coarse pubic hair.
And then there are secondary sex characteristics, which develop at puberty and are not directly involved in reproduction, things like pubic hair, enlarged breasts or facial hair.
But a study involving over 1,000 students in America found that 96% of females and 87% of males had either partially or completely removed pubic hair within the past month.