There are abundant indications that being in love only made its appearance late on in the sexual relations between men and women; so that the opposition between sexual love and group ties is also a late development. Now it may seem as though this assumption were incompatible with our myth of the primal family. For it was after all by their love for their mothers and sisters that the troop of brothers was, as we have supposed, driven to parricide; and it is difficult to imagine this love as being anything but unbroken and primitive--that is, as an intimate union of the tender and the sensual. But further consideration resolves this objection into a confirmation. One of the reactions to the parricide was after all the institution of totemistic exogamy; the prohibition of any sexual relation with those women of the family who had been tenderly loved since childhood. In this way a wedge was driven in between a man's tender and sensual feelings, one still firmly fixed in his erotic life to-day.[73] As a result of this exogamy the sensual needs of men had to be satisfied with strange and unloved women. In the great artificial groups, the church and the army, there is no room for woman as a sexual object. The love relation between men and women remains outside these organisations. Even where groups are formed which are composed of both men and women the distinction between the sexes plays no part. There is scarcely any sense in asking whether the libido which keeps groups together is of a homosexual or of a heterosexual nature, for it is not differentiated according to the sexes, and particularly shows a complete disregard for the aims of the genital organisation of the libido. Even in a person who has in other respects become absorbed in a group the directly sexual tendencies preserve a little of his individual activity. If they become too strong they disintegrate every group formation. The Catholic Church had the best of motives for recommending its followers to remain unmarried and for imposing celibacy upon its priests; but falling in love has often driven even priests to leave the church. In the same way love for women breaks through the group ties of race, of national separation, and of the social class system, and it thus produces important effects as a factor in civilization. It seems certain that homosexual love is far more compatible with group ties, even when it takes the shape of uninhibited sexual tendencies--a remarkable fact, the explanation of which might carry us far.