And managers that adjusted my schedule that day never asked me if I volunteered to work when I mentioned I was not available.

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The four have combined for five pay-per-view matches since last year's WrestleMania, the kind of work-rate wrestlers on a punishing 200-day-a-year schedule could appreciate more than any five-star match.

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Along with a healthy median salary and a job growth outlook of 38% by 2020, the job is low stress, because most hygienists have a fair amount of autonomy, are in charge of their own schedule and leave work behind when they exit the office at the end of the day.

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