Until the united states, and recentlt, marriage and sex were consentual as soon as a woman started menstrauting. That is how it is in other parts of the world still. It is psychologically, and physiologically correct for girls to start having sex then. When they menstraute, it represnts sexual maturity, and mental maturity is not far behind.
Thats just an argument for having sex at any age down to menstraution. That doesnt mean thats how it should be done. To lead a healthy and productive life, abstinance should be practiced till marriage. All the pre-marrital sex people have, just promotes the hedonistic lifestyle that most of the capitolist countries enjoy.
I have to go to class.