Dad teaches his son how to shave while shoving a cock inside him.

They were sitting on couch, getting the usual scolding again, their dad had caught them kissing and they knew now would come the speech about how men should be men and all that. They were fed up and just wished it would end and just go back to their room to continue touching each other. Finally it was over and running back to their cave, they started as usual with games, but quickly left the kissing behind. However, something changed that time, they saw their father at the door, he had never seen them like that. And they couldn't help but notice the bulge between his legs. They decided to take a gamble and invite him to join them.