One stone too far???

In this out of the way village there was a man called "Onestone". This wasn't his real name but everyone called him it because he had only one testicle. After years and years of this torment Onestone cracked and said, "If anyone calls me Onestone again I will kill them!"
The word got around and nobody called him Onestone any more. Then one day a young girl forgot and said, "Good morning Onestone." He jumped up, grabbed her and took her deep into the forest, where he shagged her all day, he shagged her all night, he shagged her all the next day, until she died from exhaustion.
The word got around that Onestone meant business. Years went by until a woman returned to the village after many years away. She was overjoyed when she saw Onestone and hugged him and said, "Good to see you Onestone." Again, Onestone grabbed her and took her deep into the forest where he shagged her all day, shagged her all night, shagged her all the next day, shagged her all the next night, but she wouldn't die!
What is the moral of the story?.........."You can't kill two birds with one stone."