A male friend of mine is 18. Recently, a female who's 15 has started showing interest in him. She just broke up with her boyfriend, and now constantly talks to him, and trys to talk dirty with him. He's uncomfortable with the age difference, but because he's never gotten female attention before, he keeps letting her flirt/talk dirty to him. However, he's said he isn't interested in her. I've tried to tell him to stay away from young, unstable girls, but he won't listen. How do I get him to realize that she's not good for him?