By the time that my failure to reproduce is an issue, i'm old. That's a diffuse benefit. Why should I care? It's like being worried about deficits in a timely manner. Who cares? My dad sure didn't. I remember him telling me to pound sand on the topic - "by the time it is an issue i'll be dead and you will probably too".

I did reproduce, for the record. But it was hardly beneficial to me. Paying their way through life made my retirement worse than it might have been. That and the ex-wives.

Edited to add: gay men have a huge advantage here.