While watching a nature documentary, they stated that elephant seals spend all of their time "fighting and fornicating."
"Daddy," Jacob said. "What does fornicating mean?"
No pause. "It means fortifying, you know, like he is guarding his perimeter." Mr. B said this quickly and matter of factly.
So just for future reference in a play date, Jacob's language is not his fault, you can blame Mr. B.
*Also, this is one of the many reasons I hate nature documentaries.