Personally I think it's probably more about the emotional or intimacy factor that would put someone off such a career. There is no inherent intimacy (taught, o

Personally I think it's probably more about the emotional or intimacy factor that would put someone off such a career. There is no inherent intimacy (taught, or otherwise) to working as a greeter or fast food worker, but whether through cultural or biological forces, I would imagine most people would consider sex an intimate act which would put them off pursuing it as a career.