Daisy started this, not me. So before you go getting all offended, take a deep breath and read her post first. I will wait.
Without going into quoting research or opinion pieces, like Daisy did so well, let me summarize and totally oversimplify the argument: Married childless couples are selfish for not having children. They are shrinking the US reproduction rate, potentially burdening future generations of workers. They are opting to spend more money on themselves and pursue careers. They are speaking up about children in "adult" restaurants and getting them banned.
Apparently this is upsetting both "breeders" who feel defensive, and the childless who don't want to be labeled as selfish. Let me be painfully clear: it is selfish, and that is totally ok.