Because men, compared to male chimps, have such relatively small testicles (large testicles indicate a species where many males mate, one after the other, with the same female), we might guess that promiscuous societies were uncommon in the immediate human past.


Shadows of Forgotten Ancestors (ed. Ballantine Books, 2011) - ISBN: 9780307801036

Carl Sagan Quotes

Because men, compared to male chimps, have such relatively small testicles (large testicles indicate a species where many males mate, one after the...

Because men, compared to male chimps, have such relatively small testicles (large testicles indicate a species where many males mate, one after the...

Because men, compared to male chimps, have such relatively small testicles (large testicles indicate a species where many males mate, one after the...

Because men, compared to male chimps, have such relatively small testicles (large testicles indicate a species where many males mate, one after the...