Military tolerance of prostitution is limited by its threat to troop loyalty

Evidence

Unlike cash, food, and housing, however, sex brings risks for military leaders. Sexually transmitted diseases are one obvious concern. Another is the conflict over women that can arise between male soldiers, or between the soldiers and local men. Less obviously, sex brings with it the possibility that a partner and children could challenge the military’s monopoly on troops’ time, loyalty, and emotional attachments. — David Vine, Base Nation_ How U.S. Military Bases…, 546