My question on human physiology was closed as off-topic: Why are many unable to defecate and urinate simultaneously?
The closing reason says:
"Personal medical questions and health advice are off-topic on Biology. We cannot safely answer questions for your specific situation and you should always consult a doctor for medical advice."
I was surprised by this close reason, as it never occurred to me this question might be interpreted as personal. How would I know a priori whether a human biology question is personal or not?
For comparison, currently the most upvoted human-biology question is:
What is the characteristic difference that makes Why do I only breathe out of one nostril? on-topic and popular, but Why do we poo and pee in series and not parallel? off-topic?