Highlights from today's Supreme Court arguments on Proposition 8, California’s ban on same-sex marriage.

JUSTICE ELENA KAGAN: Suppose a state said that, because we think that the focus of marriage really should be on procreation, we are not going to give marriage licenses anymore to any couple where both people are over the age of 55. Would that be constitutional?

CHIEF JUSTICE JOHN ROBERTS: If you tell a child that somebody has to be their friend, I suppose you can force the child to say, this is my friend, but it changes the definition of what it means to be a friend.