Surprised this post did not get more responses.
The gist of the paper is that screwing everything in sight is not the path to a fulfilled life, but marriage and children are. It's how we are built.
Well perhaps It is because we are the "shoot every bit of paper, steel and selected game in sight" group we don't have time to screw everything in sight? That would inhibit our search for fulfilment via reloading supplies.
No time for "finger banging Mary Beth rottoncrotch through her frilly pink....."