-- Okay, so, like you know how, formerly, people might have many kids to insure for some old-age security?
-- Yeah.
-- Whereas now we have pensions...
-- Okay....
-- So it isn't procreation anymore which provides benefits, but sex itself.
-- Ah-ha, so a broad network of past lovers with hope translates into a large network of
friends.
-- Exactly. Benefits lead to
friends, and
friends can be called-on for help and moral-support even when it's challenging for them at-times.
-- Ah-ha, a sexpension of disbelief!!