From your past posts, I have a mental image of your insisting that the guy rodgers long and well three times a night - when your libido is low! That leaves the poor boys totally juiceless and useless for a few days. Massive compansation would be in order.
Mind you I did have a friend who loved to watch boys cum. He often offered them 1500 baht a shoot and some boys earned 7500 baht in about 4 hours.
Yes reservations would be adviseable as he does not work every day.