"If I have children with a wife or girlfriend, chances are she'll do most of the childrearing, and in particular the most dirty, repetitive and unrewarding parts of childrearing."
I disagree with this because women are people too. I feel if a male and female both decided on having children they both should equally take care of that child. Unless they follow the system of one parent working and the other stays home with the child(ren). Even then just because you provide for the household doesn't mean you shouldn't spend time with your family. I believe that parents should take both parts in caring for the household if its working or not. While one works outside the other is working at home making sure the house is clean and under control.