Another Bad Word

After I related my "Three Bad Words" story to my son, Elliott, he recalled this story.  I had no memory of it (a not uncommon event with me), but I trust his version, which follows:

About age six, Elliott was out on the street playing with some friends  his age.  There were some older boys there, and they were taunting another boy, yelling "Georgie, Georgie, King of the Boners! Georgie, Georgie, King of the Boners!"

Elliott came into the house, and asked me what a "boner" was.

Of course, my first response was a demanding: "Who told you that word?"

He said he heard it on the street from some older boys he did not know.

Then, I told him a "boner" was a mental error.  For instance, in baseball, a dumb play might be called a "bonehead play".

However, it soon became clear (not sure how) that this what not the meaning that the older boys on the street were using.

So, I told Elliott that sometimes for a male adult, they can get excited, and then their penis gets very large and very hard, and that is a "boner".

Elliott, age six, said he found this explanation to be totally incomprehensible, as in "I have no idea what my father is talking about?"