Do you use anti-ageing creams? Besides hiding your wrinkles, they may also negatively impact people's perception of your sincerity, say researchers. The findings showed that human brains are pre-wired to perceive wrinkles around the eyes as conveying more intense and more sincere emotions.

This eye-wrinkle feature, called the Duchenne marker, occurs across multiple facial expressions, including smiles, expressions associated with pain, and expressions of sadness.