It seems to me that the Lord intentionally makes siblings as different as possible. After two years of getting acquainted with our firstborn, Easygoing Ethan, we had come to expect a second boy of similar temperament. Aaaaand then we met Marcus Mayhem. But as different as these kids can be (which is remarkably like my brothers and me, and you and your siblings), my boys are best buddies. They play together. Fight imaginary battles together. Fight real battles together. They a