Thanks for the feedback and suggestions. This boy is not a street boy; he works at a popular bar and is quite a popular boy himself. I think the back acne is from sleeping on a dirty pillow/mattress. If he wanted a new set of sheets and toiletries, he'd get them yesterday but I don't think money is an issue with this boy.
I think Nirish might be on to something here. Come to think of it his eyes were somewhat glazed that night. He looked tired but was dancing like mad. I've decided not to off him.
I agree with the general sentiment that Thai boys usually maintain good personal hygiene and this was an exception.