Secret Identity?

Just got back from seeing Batman Begins. Enjoyed it immensely, but one thing bugged me greatly. Does Batman have to spill the secret identity to a girlfriend in every frickin' movie?!? I mean, it is a SECRET identity, isn't it? From Vicki Vale to Selina Kyle to Chase Meridian to Rachel Dawes, it seems like Batty has a hard time keeping it in his mask, no?