Smiling Portrait

- Smiling is a pre-laughing device and is a common pattern for paving the way to laughter;
- Smiling can be used as a response to laughter in the previous turn. Smiling and laughter have different functions in the order of sequence in social situations.
• Sex appeal
Smiling is a signaling system that evolved from a need to communicate information of many different forms. One of these is advertisement of sexual interest. Female smiles are appealing to males, increasing physical attractiveness and enhancing sex appeal. However, recent research indicates a man's smile may or may not be most effective in attracting women, and that facial expressions such as pride or even shame might be more effective.