Whydo so many girls prostitute themselves and is it worth it to work as a sex massage girl? The short answer: It depends. If she's an average looking girl, over 30-35, she most likely won't be working in higher class massage parlors that attract clients that are willing to pay more. Rather, she might work a 12-14 hours shift in a regular massage shop, that allows her offer clients a special massage (i.e. HJ, BJ, full service) to earn a few more bucks. So, how much money do Bangkok sex massage girls make? Let's do the math.