God hath given her no small consolation, that of childbearing. . . On the Trinity . The image of God . Summa Theologica . Seminal discharge defines the essence of sexual intercourse.
Procreation is the only moral purpose of intercourse.
Procreation naturally generates an adult. Those who procreate should provide what is necessary to rear the child they created. The family is the best place for rearing children. Females are inferior to males. The male should govern the female.