Should rational men take into account when considering very long term relationships with women that the women are likely to remain physically and mentally healthy longer than the men are, with the effect being amplified if the woman is younger than the man? If that factor is considered, then independent good sense is very valuable.

To make it more specific, it's highly likely that in a very long term heterosexual relationship, the woman will be wrangling medical personnel for the man. Of course, it's also pretty likely that at some point, the man will wrangling medical personnel for the woman, just not as likely.

Numeracy level of both marriage partners has a large impact on lifetime savings