"Treating A Cold" joke

When Pat and Mike met each other on the street one day, Pat noticed that Mike had a terrible cold.
"Have you seen a doctor about that cold?" he asked.
"No," said Mike, "But I probably should. Do you know a good doctor?"
Pat gave him the name of his own doctor and assured him that he'd be in good hands.
About a week later, they met again and Pat wasn't sure if the cold was really better.
"Did you see my doctor?" Pat inquired.
"Oh, yeah," Mike replied. He was a really nice guy!"
"Well, did he give you something to help your cold"?
"Sure did!" Mike answered, somewhat enthusiastically. "He told me to drink a big glass of fresh orange juice after a hot bath."
"Well, did it help?" Pat asked hesitantly.
"How do I know?" Mike retorted. "I haven't even finished drinking the bath yet!"