Your response makes no sense. What unpaid work? What does your desire to buy sex have to do with the labour theory of value? I dont think you understand the discussion.
Economic value of a service IS determined by the pleasure one gets from it. Do i need to use drawrings to help you? Marx was a village idiot who con men used.
Demand is determined my the pleasure one gets from it. Supply follows that demand. So the pleasure determines everything else. Do i need to make drawrings for you?
The better the product the higher the price. It allows you to be on the high end of that supply, to which there will be less demand for due to the higher price.