What does this mean to you: It's not a crime to love what you can't explain?

Well, I think it’s pretty much what Zikomo stated. Love is very unpredictable and love can be very difficult to find in your life. Klaus fell in love with Caroline because she’s the only person he can truly trust and tell her everything that he doesn’t want to tell other people. Even though he values his family (especially his siblings and the vow they made “always and forever”), he can truly tell how he feels to Caroline without feeling judged.