If there's a high value being placed on one gender over the other, the dynamic gets disrupted. Catherine Salmon More Quotes by Catherine Salmon More Quotes From Catherine Salmon There's a principle that each child is trying to be different from the one immediately older, so if you had three middles, the first and third would likely be a bit more similar to each other than to the very middle child. Catherine Salmon health-news Twins are the special focus of their parents, there's typically less competition between identical twins. Fraternal twins, however, behave more like other siblings. Catherine Salmon health-news Middle-borns don't have the rights of the oldest or the privileges of the youngest. Catherine Salmon health-news Parents are more lenient, so youngest kids tend to be less rules-oriented, and yet they still get lots of attention. Catherine Salmon health-news If the firstborn can't excel at what the family values, for example, that position could shift to another child. Catherine Salmon health-news