Once upon a time I flatted in London with two economists. One of them, Miguel, was from Madrid and he had learned most of his English while studying at London Business School. Thus he would talk about his "portfolio of shirts." I teased him at the time (very kindly) but I later realised how wise was his view of the world and how it could er, justify one's shopping habits.
Statistics show us that more and more women are choosing not to have children, for reasons that are as varied as the seasons. With that, one would hope the negative attitude towards those who opt out of parenthood, the idea that they are unnatural and selfish, will dissipate. Not wanting kids doesn't make you any less of a woman or a bad person. Talking about not wanting kids doesn't make you offensive, just honest. Not wanting kids doesn't automatically mean you dislike them. Having kids reluctantly, as a kind of 'just in case' policy is probably not the best idea.