Teaching teenagers.

Today I was working with one of my students in our independent study. There we were, reading the text, debating the grammar, and discussing the history of the dynastic relations and the international politics of the time... we laughed at something he said and he turned his head back down to the text. Suddenly, there it was, glaring forth from under his button down's collar, a deep-purple hickey the size of a small hamster! It looks like he had a run-in with a toothless vampire! For an instant my brain stutters. I didn't even realize he had a girlfirend, (boyfriend?)! What would his super-conservative father say? Is he being careful? Is he doing enough that he needs to worry about "being careful"? Should I say something and remind him about the importance of responsibility and... suddenly he says, "This isn't making sense." I reply, "Um.. well, the antecedent to the relative pronoun actually follows the clause, there, in the ablative absolute." And thankfully, I am saved.