That is, on a submarine, a bunk is shared by two or three sailors on a rotational basis. This would give a different meaning to unit cohesion. Setting aside bunks for women would be a blow to the morale for men. I suspect that many U.S. sailor's wives would not be as accommodating as Swedish wives and would vehemently oppose such a policy. Men would not accept such treatment of his own dependents by the enemy.
Men feel more vulnerable and protective towards women.
This creates a feeling of added responsibility with men and a threat to his male potency. If he is unable to protect the women in his unit, it would make him feel like a failure. The morale of military personnel is affected with the unplanned loss of female sailors aboard ships. This imposes great strain on fellow shipmates. The other services experience the same problems.