Why always have sexual fantasies?

Concentrate on your studies or your favorite hobbies, exercise more and distract your attention. In adolescence, many people will be highly sensitive to sex: when they see books or TV about gender, they will have an impulse and excitement, and boys will even have an involuntary erection of penis, and girls' vaginal secretions will increase; Seeing the beautiful opposite sex, the brain often can't help dreaming. As a result, some people will think that they have gone bad, their brains have become complicated and they regret it. This is the "disaster" brought by adolescence. This is a normal sexual physiological and psychological phenomenon during development. Human gonads are basically in a deep sleep state after birth, so there will be no sexual excitement in childhood. Only in adolescence, the gonads of boys and girls begin to develop and mature gradually, so under its action, sex hormones will be produced, mainly androgens for men and estrogens for women. Under the action of hormones, people will have sexual fantasies.