Data are not available on the gendering of those relationships.
Each of those relationships had offspring, or else cared-for sprogs of some sort.
Ninety-nine of those relationships were shit; but one worked really well.
Of the group anthro-apologists call Shit99, 50% of the sprogs expected their own relationships to be different.
They were (statistically) disappointed.
The other 50% expected their own relationships to be shit as well.
They were as sad as the previous generation; but realistic in their expectations.
Of the singularity anthro-apologists call Non-Shit1, all the sprogs expected their own relationships to be equally non-shitty.
They were (statistically) disappointed.
Continue this pattern for all ensuing generations and you have a reasonable idea why, inter alia, anti-depressants are so popular today.
