Most people assume that couples who don't have children are ridiculously selfish, choosing to have their life revolve around them, drinking strawberries and champagne on the beach and not giving a damn about bringing up the next generation. Just because you don't want to have children doesn't mean that you're going to be on a permanent holiday, nor does it define you as being a selfish person. You enjoy your current lifestyle and that's that. You don't want to have the responsibility, stress and the pressures that come with being a parent and if anything, it would be selfish of you to have a child as a result of giving into pressures set out by society.