Throughout
The Sorrow of War, Kien has a number of interactions with women, many of whom he is romantically interested in. In this moment, though, he doesn’t want to have sex with the sex worker, perhaps because he senses that she just wants to thank him for helping her fend off a vicious abuser. But Kien has seemingly no interest in meaningless sex, even if he’s lonely in his postwar life. Rather, he helped her simply because she needed help, thus illustrating his willingness to put himself in danger for others—a willingness he perhaps cultivated in the war, when he became accustomed to the idea of sacrificing himself for North Vietnam.