Secondly, the water pressure around a swimmer's body can vary significantly, depending on their position and movement. When a swimmer is swimming or diving, they create areas of high and low pressure around their body, which can cause their trunks to shift or become dislodged.
"It's not just about the physical exposure," says Dr. Jane Smith, a psychologist specializing in beach-related trauma. "It's about the loss of control and the fear of being judged by others. People who have experienced this phenomenon can develop a range of emotions, from shame and embarrassment to anxiety and even PTSD." My Swimming Trunks Have Been Sucked Off