The cavemen recognized the signal as a sgin to mate. They were excited but of course there was only one woman here so they had to race to her first. Jeff and Kevin ran to Rose while trying to push each other off grunting the whole way. Then Kevin aggressively killed Jeff in the gut to send Jeff to the ground needing a moment to catch his breath. That's when Kevin pulled down his thong cloth exposing his long cock and inserted it into Rose's waiting pussy. The cavewoman moans as Kevin started humping into her as she does the same. As grunts and moans continued Jeff got up from the ground and grunted in disapproval as he ignored there moans and explored to the end of the cave to be in the sunlight. Meanwhile Kevin and Rose were about to reach the climax of there sex as came together ending with a pleasure fulfilling scream into soft moaning. Kevin released himself from Rose has he laid down in exhaustion. Rose rolled over to embrace him and bury herself in his chest. However there afterglow was short lived as Jeff stated to run back towards them grunting and yelling to look. The couple got up to see what he was talking about as they followed him to the end of the cave. As they approached, the newly devolved friends were shocked to see...