The fear that girds the lack of platonic touch among American men also fuels the destructive force of their hands, a 2002 study in the journal Adolescence found. Dr. Field was the lead author of the study, which looked at 49 cultures. “The cultures that exhibited minimal physical affection toward their young children had significantly higher rates of adult violence,” she said. But “those cultures that showed significant amounts of physical affection toward their young children had virtually no adult violence.”