It is funny b/c twins are just different than everyday single babies like me or Harmon. I don't notice the differences until I have one of those "aha" moments. My most recent has been Rachel. She was given a baby Cinderella doll and stroller for Christmas. She didn't like it that much until Dia de los Reyes Magos (which is 3 Kings Day or the Epiphany, a Hispanic tradition celebrating the Wiseman giving gifts to the Christ child). We had a little party (complete w/King's bread) and my mom brought the kids gifts of course. Rachel's was a doll. She looked at it intently and put it in the stroller. Suddenly she was SOOO happy. The stroller looked right and now it is her favorite toy. If something happens to one of the two dolls she gets very angry until they are together again.
I guess it makes sense. After all her life has always been side by side with her brother. She even gets real confused when she sees my niece Juliet alone. She doesn't like babies being alone. I think she thinks everyone has a twin. Maybe that is why she gets scared when Harmon is around sometimes... after all where is his twin? Callum thinks in similar ways. He won't sleep unless Rachel is in the room. He loves just knowing she is there. It makes me sad to think of when they will be separated when they start school (Rachel will be in a special program when she turns 3 for her CP and Callum will likely go to a Montessori Pre-K). But even though they won't always be together I know their bond will always keep them close together forever.
Sometimes it makes me wish I had a twin or it makes me sad Harmon doesn't have one. Than I realize if I had two crazy energetic Harmon's running around my home we would never have had the twins :p