Nudes for bf ?

My boyfriend got nudes off me back in December and he always calls me sexy/hot/beautiful but I just want to ask him for nudes but without saying “will you send nudes” as it sounds very harsh ... he never said that to me when I sent to him we just kind of started seating from him and then it continued and he then sent a picture first , I would like to get nudes off him but I’m not sure how to exactly any ideas ?