Can I?

Little Johnny sees his grandfather smoking and asks if can he try. The old man says "can you touch your ass with your dick yet?" "No" says Johnny. "Then you can't have one" says his grandad.

Then the old geezer is drinking alcohol. Johnny asks can he have some. But he can't as he couldn't touch his ass with his dick yet. Later Johnny is eating cookies and his grandfather asks can he have some. Johnny asks,"Can you touch your ass with your dick yet?" Why of course I can replies the grandfather. Johnny quickly replied "THEN GO F**K YOURSELF!"