The Most Talked-About Secret EVER

I believe this picture is the most talked about secret EVER on Post Secret.

(For those who aren't familiar with Post Secret, it's a website that publishes pictures of homemade postcards. People make the postcards to express their deepest secrets--sometimes rather mundane, sometimes incredibly dark and disturbing--and send them to the publisher's address, and he posts them on the website and [sometimes] includes them in his books.

It's a fascinating website, but not always fit for family viewing.)

The interpretations have ranged from eating disorders to sexuality to sign language, with most people agreeing that the numbers represent ages. I wonder if the numbers might represent a medical pain scale (as in: "On a scale of 1 - 15, the pain in your shoulder is . . .")