As it is known that some people who live in developed countries and minus population growth do not want to have children (childfree). Don't they realize that their behaviour will cause the population of their country to (more) decrease? This situation of course will cause other things that are detrimental to them. In this regard, several countries experiencing this situation will actually provide benefits for those who have children. Again, of course, they are not stupid. Therefore, the question arises, what are the advantages and disadvantages of being childfree?