Discussion: I am a young gay man of 15. An older man wants to support me financially in exchange for violent sex. I need money, but afraid.

Your fear is justified and is not just a physical fear. The emotional-mental damage may be much more severe than the physical one. (Beyond the fact that this is probably illegal.) The sexual experiences of a young age are profound emotional experiences that will accompany you for the rest of your life. You may misunderstand and get misconceptions about love.