I think the older we get the more important the future becomes for us. Young people who make a decision to remain single have a flattened time line (hardly any depth). I met too many lonely older people who regretted making that decision. We have parents and grandparents who are our links to the past but to decide to have no children leaves one with a truncated future. It is important to remember that reproduction is a powerful human drive and should not be overridden.
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