According to a BBC News article, playing in the dirt not only helps you develop a healthy immune system, but also makes you happier. “These studies help us understand how the body communicates with the brain and why a healthy immune system is important for maintaining mental health. They also leave us wondering if we shouldn’t all spend more time playing in the dirt.”
So sliding around a mud-hole with a V8 engine roaring away with the throttle pegged to the floor had nothing to do with it, then?