If I had to solve a problem, like for example, to know what my son does when he goes out with his friends; or to solve an infidelity case; to chase a person; to obtain proves that the theorical "illness" of a worker is false...in those cases, maybe I would employ a private investigator.
Otherwise, I have never had any experineces with them.
If someone offer me a job of helping a private investigator, I will prove it, and, if I like, I will go on.
I would like to do this because I think it could be very amusing, emotioned and varied. On the othe hand, it could be a little dangerous in some cases.
Finally, I've never had strange jobs. When I was a teenager, I worked as a saleswoman in a bar at BARÇA stadium. I also worked as a saleswoman at a parents's pastry job.