I would definitely agree that it could be any career that creates a high number of opportunities for there to be "opportunities" .How many nurses have you dated? Perhaps an individual's nature gravitates toward certain occupations?
That puts the odds higher even for those rigorously monogamous persons. Because face it, both sexes can do stupid things if not dedicated to a M. Really, even after a dumb temp fight with a spouse, the right conditions may tempt one. Right time right place with higher opportunities realistically is higher chance of cheating.