There is actually great wisdom in No.6. Back in the time before the Depression ( that one your parents were always talking about) hospital emergency rooms did not have to take all comers. When the difference between poor folks and rich folks might be characterized by access to laundry facilities, triage by the ER nurse often included observing whether the patient had clean or dirty underwear. If you had dirty underwear, you were deemed too poor for the hospital to treat and you could be shipped out the door no matter your condition. Thus the cautionary advice.
There is actually great wisdom in No.6. Back in the time before the Depression ( that one your parents were always talking about) hospital emergency rooms did not have to take all comers. When the difference between poor folks and rich folks might be characterized by access to laundry facilities, triage by the ER nurse often included observing whether the patient had clean or dirty underwear. If you had dirty underwear, you were deemed too poor for the hospital to treat and you could be shipped out the door no matter your condition. Thus the cautionary advice.