This isn’t a surprise or shock. The Jaw bone development is highly influenced by sex hormone exposure. I personally look at the jaw bone (followed by the rest of the skull) before the pelvis when guessing the probable sex of a skeleton.
Are you doing that in a professional capacity or is this more of a hobby?
Do what you love and never work a day in your life.
It strikes me that the saying can mean the person is enjoying their profession... Or that nobody else values their passions and they are very unemployed.
Looking at skeletons for fun or profit
Especially after you get caught by the police
They can also do this for retinas, which human doctors can't notice any sex differences in.