>>22071006Ostensibly it's a "methuselah's children" type situation.
>society values elders and longevity and is structured around oldest members of society>eldest people used as a societal focal point for various events that allow extended family members to stay in contact which each other (amplifying access to resources for everyone.)Middle-aged people, as a consequence, tend to delay their child-rearing age so they can honor grandma and grandpa
(This is a selective pressure, which one fact causes many people to wait until they're infertile) - HOWEVER those that are virile longer succeed in being older parents and passing on their "old-age virility" genes.
Continue this cycle more many generations and you eventually get sexy 50 year-old women who could probably still get knocked up.
This is also how you breed people with really long life-spans, in general.
