[There's the question he knew was coming, but it's the angle that he has to adjust to. It's not "what happened to you", or "why do you have so many eyes", but something aimed directly at the heart of the issue.

If he thinks it over for too long, he'll get stuck on it. So he nods, like he's confident about this, and starts explaining.]

Up until about two years ago, I was completely human. Then I entered into a contract with a... god, you might say. She gave me something I desired in exchange for a year of my service. Unfortunately, exposure to fae magic had somewhat... unusual effects on human physiology.