In this chapter, we learn that matsu is in the sex club with his girlfriend, sumida, and a boy friend. matsu tells us that his girlfriend is a prostitute, but that she does not trust him or any of the other men in the club. He says that sex is not dirty, and that the men do not force women to do anything they do not want to do. He tells us, however, that he teased his friend a little, and he thinks he said too much. .