I find it hilarious when they moan about how they are discriminated against as childless. Try going to a restaurant, flying on a plane, having to take time of from work because of sick child, paying 800 a month in nursery costs...Ha ha ha....Yes, families with children really rule the world...NOT!
Of course you don't know what tiredness is until you've had a baby! For God sake this Zoe Williams can sleep off her hangovers at weekend, can't she?
I don't think it's selfish not having children, but I definatly think having children make you less selfish (if that sounds right). I am sure you can lead avery happy fulfilled life without having children, but then they should get on with their happy childless lives rather than writing paranoid articles about people who have other things to do than read them (like taking care of their kids,))