Most likely because modern women didn't care much for that "knock 'em over the head & drag 'em back to the cave" sort of dating scene. ;-)
But modern guys invented the "paper bag" to facilitate interbreeding attempts between them and Neandertal women. ;-)
A #3 postal canvas sack works well too.
*****But modern guys invented the "paper bag" to facilitate interbreeding attempts between them and Neandertal women. ;-)*****
when did alcohol first hit the scene? =P
Just keep in mind that the average Neanderthal temptress was burlier and stronger and quite possibly furrier than the average Cro-Magnon dude, so that whole "knock 'em over the head & drag 'em back to the cave" scene might've been a deal-breaker for the modern guys, too. ;^)