Some detectives specialize. Detectives whose specialty is detecting kissing might benefit from the method described in this study:
“Detecting Kissing Scenes in a Database of Hollywood Films,” Amir Ziai, ArXiv 1906.01843, 2019. The author reports:
“We experimented with a variety of 2D and 3D convolutional architectures such as ResNet, DesnseNet, and VGGish and developed a highly accurate kissing detector that achieves a validation F1 score of 0.95 on a diverse database of Hollywood films ranging many genres and spanning multiple decades.”