My girl likes tracing the scars on my body, but only because I have so god damn many since I'm a masochistic moron. So it's akin to tracing preset patterns around my body. I don't think she finds them "hot", but mere a fun thing to trace her fingers on.

I find them arousing. But that's likely because they make me think of pain, blood, and violence. Which, in turn, makes me think of sex.