Forbidden Wet Tales(2003)

One day, a man meets a woman and they start chatting at a restaurant. As a writer of erotic films, he tells her some historical erotic stories in the background of the Chinese empire. After the meal, he takes her to a hotel and they have a romantic night. The next day, she goes to the bathroom and finds a woman’s dead body in the bathtub. The man admits he killed that lady to reach the high during sex…