Several people have posited that it is “assur” for boys to wear shorts. so far, the only “issur” mentioned is trampling on someone elses seisitivities and the always easy to throw around “tznius”. Is there a posek that has issued a psak that it is forbidden for a man to go out jogging in a pair of shorts?
Please consider the following question and answer.
Q: Is it permissible to pray the Amida while wearing shorts?
A: Only in areas where it is customary to wear shorts in the presence of prominent and distinguished people, such as in agricultural communities; even in such cases, however, one should not serve as Chazan while wearing shorts (Halacha Berura).
If the wearing of shorts was categorically assur, would this answer make any sense?
The Q & A comes from here. http://www.mishnaberura.com/Default.asp?ChelekID=1&SeifID=319