What Do You Do...

Here is another one from my memory.

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A chiropractor was standing in a ticket line and noticed the man in front of him seemed excessively tense.
He reached out and started massaging the man’s shoulders.
The man, shocked by this, spun away from him.
“What the hell are you doing?” demanded the man.
“I’m sorry, I noticed you were tense and I’m a chiropractor. It’s what I do“, replied the chiropractor.
The man shot back with, “Well I’m an attorney, but you don’t see me screwing the guy in front of me, do you?”