The secret to eternal friendship

My daughter was telling me this morning about a conversation she had with a friend she's known since her days in self-contained special-ed kindergarten, almost ten years ago. Apparently, the two were discussing what good friends they are, and enumerating the overwhelming number of things they have in common. Explained my daughter: "We both want BMWs when we grow up. We both like 'Suite Life.' We both like Raven. We both like 'High School Musical.' We're like sisters! We're twins!" (I refrained from pointing out that she had tried to watch "High School Musical" twice and had fallen asleep both times. If this is the worse that liking something because your friend does gets for her, I'll be happy.)