Researchers classify the most effective flirtatious cues including slight smiles and head tilts

When it comes to flirting, it's all in a look. Women give specific facial cues when they're flirting, according to researchers at the University of Kansas. The team used the Facial Action Coding System (FACS) to identify the most recognizable flirtatious facial expressions. The technology, which describes facial movements, showed the most effective flirting cues include a head turned to one side and tilted down slightly, a slight smile, and eyes turned forward toward the target. Flirting is one of the key components of human sexuality, but it's only just begun to be analyzed by scientists.