Clark Kent gets found out to be Superman. The doctor is doing a checkup by opening Superman's shirt, Superman's costume is revealed underneath.
Superman doesn't have many weaknesses so it wouldn't make sense that he needed a checkup.
Why is Superman at the doctor's office?
They think now kryptonite is actually good for you, in small doses.
scene: doctor's office description: Clark Kent gets found out to be Superman. The doctor is doing a checkup by opening Superman's shirt, Superman's costume is revealed underneath. uncanny: Superman doesn't have many weaknesses so it wouldn't make sense that he needed a checkup. entities: Superman, Stethoscope, Physical_examination. caption: They think now kryptonite is actually good for you, in small doses.
A joke about modern medical findings sometimes being counter-intuitive: some studies claim to show that things harmful in big quantities like alcohol or chocolate are good in small doses. But here, the thing that's bad for superman in large doses is kryptonite: it's a funny parallel to the other studies, and funny to think that scientists are studying kryptonite's potential positive impacts.