The "survival value" of this instinct is absolute; without it the race would not long survive. But it has "play value" also, it contributes to the joy of living as well as to the struggle for survival. There is much in social intercourse, and in literature and art, that is motivated by the sex impulse. Some would-be psychologists have been so much impressed by the wide ramifications of the sex motive in human conduct that they have attributed to it all play, all enjoyment, all the softer and lighter side of life, even all the spiritual side of life. One need only run over the long list of instincts, especially those that still remain to be mentioned, in order to be convinced of the one-sidedness of such a view. On the other hand, some moralists have been so deeply impressed by the difficulties that arise out of the sex motive, as to consider it essentially gross and bad; but this is as false as the other view. The sex impulse is like a strong but skittish horse that is capable of doing excellent work but requires a strong hand at the reins and a clear head behind. It is a horse that does not always pull well in a team; yet it is capable of fine teamwork. It can be harnessed up with other tendencies, and when so combined contribute some of its motive force to quite a variety of human activities. The parental or mothering instinct. In many species of animals, though not by any means in all, one or both of the parents stays by the young till some degree of maturity is reached. In some kinds of fish, it is the male that cares for the young; in birds it is often both parents. In mammals it is always the mother. Instinctively, the mammalian mother feeds, warms and defends her young. Just as {149} instinctively, the human mother does the same. This instinctive reaction to the little baby is attended by a strong emotion, called, for want of a better name, the "tender emotion". The strongest stimulus to arouse this instinct is the little, helpless baby. The older child has to take second place with the mother, so soon as there is a little baby there. After a child is weaned, and after he is able to get about and do for himself to quite an extent, he has less hold on the maternal instinct. The love and care that he may still get is less a simple matter of instinct.