Most of us have a secret we've never told anyone. Secrets are self-protective and universal, but some are hard to keep and impossible to share. If your secret is eating you up or has the propensity to blow up your entire life — should you share it? Are secrets better out than in? Dr Katie Greenaway says it depends. Psychotherapist Gillian Straker walks us through the shame some secrets bring and what kinds we're keeping from ourselves.