When the surrogate is Grandma, the mess is less

So says Slate's libertarian bioethicist:

Mother and daughter share a genetic bond to each other and to the child. They're much more likely to work things out and give the child a stable family environment.

Now, if you really want to get icky, try it the other way around: Grandpa impregnates his daughter-in-law. You can pretty well deduce what he's supplying. No daughter-in-law would do this, right? Sorry. A British couple arranged it last year after discovering that the husband was shooting blanks. According to the Guardian, doctors "offered to provide sperm from an anonymous donor, but the couple wanted to use a member of their own family."