system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why can't / shouldn't doctors treat family members?
gpt
There are lots of reasons, including the ethics of prescribing drugs to your family members. But here's one good example.

Let's say that in working a diagnosis, you have to ask several questions. One of them might be about sexual activity.

Would a doctor be able to ask his wife if she's had any extramarital affairs? And more to the point, would we expect her to answer honestly? These things compromise the diagnosis.

This is why a doctor's *only* interest in you should be your health. Someone who is a family member has other interests beyond that.