In a flashback Arthur is shown being admitted to the disabled hospital. There he is forcibly stripped and examined by a doctor. Full frontal nudity of the boy playing Arthur.
A woman doctor is giving the girl a medical examination when the girl reveals to her that her brother is concerned about the state of his genitals, so the woman has him climb up on a table and show them his penis for examination [not shown]. Includes rear nudity of the boy (with the little girl clearly seen looking at his front). The girl makes a reference to his times of arousal by saying [subtitle translation] "He's grown a bone in his willy".