A friend of a friend asked me why anyone would want to have their own kids instead of adopting other kids. It could possibly be a fear of the unknown, but I think people believe that they are above average and that their genes are thus above average...thus they want to pass those on and perhaps they feel that having the kid will make the bond stronger and maybe even make it easier to understand and raise the kid.

Of course I have never had a serious girlfriend and have no kids, so I could be full of shit, but that is my opinion.

I think the believing oneself to be better than average is a common attribute that may have been necessary to keep living in primitive life, and more recently I think it was popularize in our culture because it is easier to exploit us as a collected society if each of us is looking out for primarily our own best interests.

There have been surveys about weather or not people think they will become financially rich and while most people think that the number of people who become rich is a low number many people also think that they are an exception to the odds and that they will become rich.