To understand the relation man-balls you can be a scientist, doctor, soccer player or actionsports athlete. Interesting yet not totaly credible reading can be found on this link.
It seems that more and more “sports scholars” are not really gifted by determining what action sports mean to growing-up adolescents. My opinion is that not all the “casual” sports give them enough rush.
“Every person should feel the rush at least once in a lifetime. This person will either be hooked for life or not even slightly touched by it.”