Even the most confident among us have those little things we remain self-conscious about. It's one challenge to shirk off the unrealistic media images we're bombarded with daily, but it's another issue to cast off memories of bullying classmates or critical family members.
Hell is other people, and it's Dante's Inferno when they choose to poke at your self-confidence with passing insults.
There has to be some sort of dark science connected to the comments that make us self-conscious forever, and the insults we shrug off within a day. Because I'd be hard-pressed to find someone whose gone through life unscathed by the critical eye of others.