When teaching history, I used to try to explain this to students- usually with little success. People have a hard time grasping how many people it took to make them. and how that gives us huge family trees. ** This is very interesting.
I am an only child and a middle child. I was an only child for about 7 years then my parent got remarried so I have step sisters. But it's cool to see I have most qualities from middle child and only child.