I don't know about most. Every single society on the planet has prostitutes (yes, even ultra conservative places like Saudi Arabia--they have underground sex clubs just like everyone else.) I wouldn't know how to even begin surveying all the prostitutes on earth. Surely some are, but not everyone.
I don't know if "most" would be accurate. I would go with some.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.