OK. I expect to be trashed for this, but I think you just give CASH and it is up to the sex worker to spend as he pleases. It is downright COLONIAL to pay for a dentist rather than a cellphone. If the guy has the CASH, he is an adult, not a toy, and he can learn to make ADULT decisions about what to spend his money on. True, it will probably be the cell phone, so that is what he has decided he wants more. Who are we to decide for them differently? Are we their FATHERS? No! Are we their colonial western overseers that know better than them what the natives need? NO!