That this should be so is inevitable; common amusements may create a certain bond between the young, but the performance of common labours, necessitating identical knowledge, identical habits, and modes of thought, forms a far stronger bond, drawing men far more powerfully towards social intercourse and personal friendship and affection than the centrifugal force of professional jealousies can divide them.
That the same condition would prevail where women became fellow-workers with men might be inferred on abstract grounds: but practical experience confirms this.

The actor oftenest marries the actress, the male musician the female; the reception-room of the literary woman or female painter is found continually frequented by men of her own calling; the woman-doctor associates continually with and often marries one of her own confreres; and as women in increasing numbers share the fields of labour with men, which have hitherto been apportioned to them alone, the nature and strength of the sympathy arising from common labours will be increasingly clear.
The sharing by men and women of the same labours, necessitating a common culture and therefore common habits of thought and interests, would tend to fill that painful hiatus which arises so continually in modern conjugal life, dividing the man and woman as soon as the first sheen of physical sexual attraction which glints only over the unknown begins to fade, and from which springs so large a part of the tragedy of modern conjugal relations.

The primitive male might discuss with her his success in hunting and her success in finding roots; as the primitive peasant may discuss today with his wife the crops and cows in which both are equally interested and which both understand; there is nothing in their order of life to produce always increasingly divergent habits of thought and interest.
In modern civilised life, in many sections, the lack of any common labour and interests and the wide dissimilarity of the life led by the man and the woman, tend continually to produce increasing divergence; so that, long before middle life is reached, they are left without any bond of co-cohesion but that of habit.

The comradeship and continual stimulation, rising from intercourse with those sharing our closest interests and regarding life from the same standpoint, the man tends to seek in his club and among his male companions, and the woman accepts solitude, or seeks dissipations which tend yet farther to disrupt the common conjugal life.

A certain mental camaraderie and community of impersonal interests is imperative in conjugal life in addition to a purely sexual relation, if the union is to remain a living and always growing reality.