If you love him and he loves you, I should hope you can trust him to not act on his desires. The problem with being a guy is that we're always fantasizing. But we also realize that fantasizing is just that - a fantasy. Sure, that model-looking girl is great to look at, but would she have anything to say? Would she enjoy the same movies and music as you? No. So your boyfriend isn't fantasizing about a relationship. He's simply thinking about sex and not acting on it. I'm in the boat with people who feel that its healthy to fantasize so long as the person doing the fantasizing never crosses the line. Usually, the fantasy helps foster communication in a relationship, and that's always a good thing

Brian, 25, recently moved to Los Angeles. He works in film marketing and is currently in a serious, committed relationship.