Little Johny

Little Johnie is the only black 4th grader at an all white school. Little Johnie comes home and asks his dad. "Dad we had gym class for the first time, and after gym we all had to shower. Dad is the reason all the white boy's penises are so much smaller than mine because I am black." To which his dad replied. "Well partially little Johnie, but mostly it is because you are 16."