Is This A Twin Thing?

I am often asked as to whether or not I think the twins exhibit any behaviors that are a direct result of simply being a twin. The only behavior that might possibly be twin-related is that they will lay their heads on one another whenever they are close to each other. It is very cute, although sometimes it is frustrating. These pictures were taken today and all I wanted the boys to do was simply sit next to each other. That's it, just sit next to the other. It ended up being a photo session of the twins bumping heads. They have been doing this since they were released from the NICU and like I said, it is really sweet but I doubt it will look that way when they are adults..... Meanwhile, I'll continue to enjoy their cuteness.....