Possibly. I have seen quite a few that were better looking than some women, and I had a hard time figuring out if they were male or female, but the voice always gave them away, so it is hard to tell in this case.
In the west usually the voice will give them away.
But in parts of Asia pimps (often a family member) can get ahold of prepubescent boys and push them into prostitution before their voices change. If they survive that sort of childhood it will be hard for them to get out of prostitution as adults.