It's not about his code, really. But because he doesn't want to answer questions about his scars and all that. And pampered billionaire playboys shouldn't have that many scars.
Imagine how cramped Bruce Wayne's nightly schedule would be: 8:00pm - Dinner 8:30pm - Gala 8:35pm - Go home with most available female 8:40pm - Have sex with mentioned female 8:45pm - Go back to Batcave 9:00pm - Patrol