Pacing, the Manly Cave People Hypothesis

In today's example of odd non-RHEL-related assertions I encounter during this RHEL certification course, I have been informed that men pace while studying because back when men were cave men they had to move constantly in order to be able to kill stuff.  I suppose I could have rejoined with examples of modern hunter-gatherer societies, which are sometimes regarded as the original affluent societies because, spoiler alert, they don't actually have to work very hard or kill stuff as often as one might suppose, or mentioned that men really aren't the Borg, or mentioned women who pace, but I didn't.