Simon cringes every time he hears a dentist's drill, even when he is sitting in the waiting room of his dentist's office. in this example, cringing in the waiting room is

I believe the answer is: an unconditioned response

an unconditioned response refers to a form of response that naturally exist within an individual without having to be learned. In operant conditioning, unconditioned response is the initial behaviour before any modification where new behaviour is paired with a trigger is being made.

sounds good to me mate!

it all depends on how long the hours are. i think they wouldn't approve of it. in my opinion.