I'm not sure anyone thinks it is 10% now in reality. I think in the Uk there's research that says 20% - 25% so one in 5. They live all amongst us. I expect you're right about cities. Will differ with location, age, demographic, job, peers.
How come you haven't? And what about your mates/colleagues... any insight?
In other countries it differs widely. I think Thailand, Japan it's the vast majority. So demand varies culturally. I expect too that's why some men have done it as a one off in Thailand or Amsterdam - seems almost the norm, but haven't back "home". When in Rome?
You other comments might be controversial but I think there's some truth there. Unpalatable though it is. However, making money or getting free sex via exploitation isn't the preserve of these men, but I expect culturally or financially the same applies as above. More the norm if your peers are doing these things - whether having sex with a vulnerable teenager or making money from sex trafficking.
I know someone who hired a "high class" "escort" at a hotel in the Uk as a one off. Apparently they were Eastern European. Of course I will never know but for all of their defence that she seemed happy , was gorgeous, funny, in control and independent etc...I can't help but suspect there could be huge exploitation behind the scenes. Who knows, and that's the point isn't it. They don't know, and don't care, really.