But although as we have seen, the development of the sexual life is not always by regular progression, yet on the whole the increasing intensity of sexual manifestations from the years of childhood to the termination of the period of the puberal development cannot be denied. Especially extensive are the changes occurring at the end of the second period of childhood. At this period we note more particularly the development of the outward signs of sexual maturity. In the boy, we observe the growth of the beard and the pubic hair, and a more rapid enlargement of the testicles and the other organs of reproduction. In the girl, the breasts and the pelvis assume the adult female type, and ovulation and menstruation begin. During this period, also, the mental changes are extremely marked, even though in many cases these changes may have begun considerably earlier. The internal organic changes make themselves felt also in the sphere of action. The years of adolescence in the male are characterised by an impulse to travel, to adventures, but in addition to all kinds of ideal efforts and to religious activity. The loftiest ethical ideas alternate with a self-conscious bumptiousness. A change of disposition manifests itself which is sharply contrasted with the behaviour at an earlier and a subsequent age. This is no less true of the girl. That which formerly was no more than a vague indication, now becomes a manifest quality. More and more does the feminine mode of feeling display itself. The "tom-boyishness" so often seen in girls during the second period of childhood disappears. The former tomboy has become one[51]-- "In whose orbs a shadow lies Like the dusk in evening skies," and we see her-- "Standing, with reluctant feet, Where the brook and river meet, Womanhood and childhood fleet! "Gazing, with a timid glance, On the brooklet's swift advance, On the river's broad expanse!"