Nudes?

My SO keep asking for nudes.. I always tell him no because I’m super uncomfortable with sending them and with my body. He just complains I don’t want to please him. He knows I was raped by my ex, and that’s the reason I’m uncomfortable with my naked body in pictures. I don’t know what to do. I tell him that I do want to please him but he always goes back to that. What do I do??