The question is more about why the human body has been over sexualized by puritanical religious zealot freaks like yourself and why you impose those right wing religious views on others instead of just minding your own business. Many people everywhere (including in Europe) run without a shirt when it is hot and there is no rationale reason not to because it is better, why have a sweat soaked shirt weighing one down, chafing the skin and making one feel miserable. Plus it is bad for the environment as now you have a sweat soaked shirt that has to be washed. No one likes to see your ugly face but we don't insist you cover it up, we just don't look at you. Wicking is nonsense, its always cooler and better evaporation to have no fabric. The only time is is better to have fabric on is when it is cold and most people everywhere wear a shirt when it is cold for comfort and to retain enough heat so as to not get hypothermia. I do feel bad for women, that they can't run topless just because religious zealots can't control their sexual impulses if they see exposed skin, sad.