My what big ears you have!

So I took my kid to the ENT the other day for a routine check-up. After waiting an hour and 20 minutes we finally saw the dr. who looked in my son's ears, pronounced them healing fine,(a total of 5 min.) and told us to come back in 4 months. Then, as we were leaving, he takes me aside and wonders, "Has he been teased about, you know" and he cups his hands behind his ears and flaps them. "Because I have a colleague that specializes in that--pinning them back."
"No, no. I haven't heard about anything," I reassured him, mildly shocked, and leave to make my next appointment for wasting another morning.
I say mildly shocked because this is the second time he's brought it up. The first time I was so shocked I was practically speechless. Now, I know he is just looking to drum up business and I shouldn't take it personally. My son does have bigger ears. We've commented on it before. Still I've never considered doing anything about them. I think they make him look mischievous and impish. He's never gotten any flack from his friends. But then again, he's only in preschool. Kids are still nice in preschool.
What will I do if he does get made fun of? If he had crooked teeth, I wouldn't think twice about getting him braces. If he hated his glasses I'd let him get contacts as soon as I thought he was responsible. But where should I draw the line? If my daughter had big breasts and it hindered her dream of being an athlete, or gave her back-aches, I would totally get her a breast reduction. But if she thought her breasts were too small, well, I'd tell her to learn to love herself just as she is. I'd take my kids to the dermatologist if they had acne, but should I take them to a plastic surgeon if they hate their nose? I'd let my daughter get dark hair on her upper lip lasered, but what if she had dark arm hair?
I want my kids to like who they are and of course I want to facilitate their being accepted by their peers. I remember wearing glasses and hating it so much. I'd like to think it helped me to develop my personality--like it made me rely more on my humor, or my brains, to gain acceptance. But the truth is, I felt liberated when I finally got contacts. I finally felt like I could be me. I finally felt confident and pretty. At the same time, I did learn to be more compassionate for people who looked different, to be patient (I had to wait til I was 16 to get contacts), and that life isn't always the way we wish it were. All good lessons that served me well. On the other hand, maybe I would have learned that anyway without also hating the way I looked.
Perhaps my son will never have an issue with his ears (I sincerely hope not); but I'll keep that doctor's card, just in case.