She comes to him for sex, not advice, but he knows when something's bothering her. Right now it's her friends, her sister, her boss—everyone.
It bothers him too, because he always had the perfect solution for it: kill the wankers. All of them. Thoroughly. Makes the problems disappear, just like magic.
But he knows she'll never cross that line, no matter how many she's already crossed by being here with him. It's a human thing, he understands that much. He remembers being horrified by the idea of taking a life; he just doesn't remember why. It makes him cross.