You can’t provide it because there is nothing dangerous or harmful about it. Pain works as an early warning system because it makes us involuntarily draw away, but that isn’t an indicator that everything that hurts is or ever was dangerous or harmful. Some things that hurt, sometimes a great deal, are none-the-less good and you should engage in them when appropriate. I had bladder cancer. It’s a painless cancer. But the surgery to remove it sure as hell wasn’t painless; it was painful as hell. Moreso due to my CNS condition, but very painful for most everyone. Can I assume you think that surgery was harmful, and I was a fool to undergo it voluntarily because pain is an indicator that something is bad and should not be done? Or is there, JUST MAYBE, some reasoning involved? Not everything painful is harmful. It’s just not. Nor is what you are referring to as common sense any kind of accurate indicator of truth.
efdisaster said “I hesitate to do this, because it is potentially dangerous…” I asked what that danger was, because I am aware there isn’t one. You replied with “Common sense would suggest that it would not hurt otherwise.” You’re mistaken. So unless you can tell me what this danger you and efdisaster believe is, please just admit that there is none and your common sense is not a good measure of what is true.