Pentesting
In this planet, there are only two real jobs: doctor and lawyer.
Have you heard of pentesting?
What's that?
It's all about testing pens. If I drop a pen, does it break? If I open and close the cap repeatedly, will it easily wear out? What if I stab it into a piece of paper? Or rock? Or an apple? (In that case, we'd have an apple pen.)
That's it?
It's harder than it looks like.