The next morning, Dr. Jinsoo arrives at the hotel to find that the nurse has changed. She has refused all of the doctor's treatment and is now "pursuing pleasure" . The doctor explains that he cannot ejaculate because he needs to "restore his yang energy" , which is the energy that comes from the body's relationship with the outside world. He explains that if he moves too fast, he will have to "slow down a bit" and then "maybe changing the position" will help. He says that the ultimate technique of releasing "yin energy" has changed the way he releases it. He asks why he has to run into a woman he does not want to see anymore. He tells the doctor that he was "releasing yin energy again" and that the reason he is here is because he is "only doing with other women." He asks the doctor to come in and clean up his house so that he can "clean up right away" and "come in for now." The doctor asks if he is doing the same thing with the nurse, and the doctor replies that he is. He then asks if the nurse is calling his name. He realizes that he has already seen the nurse naked many times and wonders if he should treat him like a lover instead of a patient.