: Neuroscientists using facial-recognition software have found that "RBF" faces show subtle signals of contempt —such as a slightly raised lip or squinted eyes—even when the person feels neutral.
: Research indicates that while both men and women can have RBF, it is disproportionately attributed to women due to societal expectations for them to appear pleasant or "smile more".
: It can lead to misinterpretations of trustworthiness or approachability in professional and social settings. 2. Revenue-Based Financing (Finance)