Was at the pharmacy yesterday, and the pharmacist was trying to explain to an elderly man why he was being prescribed antibiotics before oral surgery.

He just did not understand how he could possibly get an infection. She repeatedly told him that there are bacteria in your mouth, and with an open wound, it can easily become infected. "Well, how does the bacteria get in there?" he asked more than once.

She had the patience of a Saint. *I* was getting frustrated, just listening. lol