Dan Savage, who has a kid, addresses Robbie George, et al:

Until you start advocating for the denial of marriage licenses to the elderly, fertility tests for the young, and the nullification of the legal marriages of straight couples who are childless-by-choice, no one should take you seriously when you argue that children define marriage because it's clear that you don't believe that either. Otherwise you would promote a "seamless garment," if I may borrow a phrase, where marriage is concerned, i.e. no marriage licenses for oldies, inferties, vasectomies, etc.

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