Why am I the second boy?

When Mark is in the car he is talking. Constantly. The conversations are always interesting and always keep me thinking about how to answer his next question. Yesterday after we dropped Eric off at school he went back to one of the usual topics. "I wish I went to kindergarten. It's not fair. I want to be five and go to kindergarten." To which I give my standard answer, "Mark, you get to go to PreK. All your friends are there and NEXT year you get to go to kindergarten." Sometimes this is enough to ease his feelings of the cruelty of the fact that he was born second. Not this day. "But WHY am I four and Eric's five. It's not fair! I want to be your FIRST boy." I explained that I couldn't help when he was born. "BUT WHY?" There it is... the why! "Because when Eric was in my tummy he was just Eric, and when you were in my tummy you were just you. Mommy didn't get to decide, I was just glad I got to have you!" And then the conversation took another turn. "But mommy, Jack and Aidan are both the same age!" (I guess he was thinking of you guys Shanna). "Because they are twins Mark." "BUT HOW?" It really never gets better with the questions. "Because sometimes 2 babies grow in a mommy's tummy instead of just one." And then taking me totally by surprise, my silly guy says "So she got even fatter than you did!" Wow! I guess he remembers me being pregnant. Then before I can wonder if he'll realize he never saw Jack and Aidan's mommy "get fat" he says "but mommy, why didn't we see her when they were in her tummy." I explained to him that Jack and Aidan were adopted and what that means. I think he understood but the conversation ended because we arrived at his school. The conversations we have can be both fun and trying. They can start out about one thing and end about something completely different. We never got back to "why am I the second boy?" although I'm sure we will visit that topic again. I love to see how his little mind works and I still hope I do a good job explaining things and answering his questions.