First up: the "one short leg on my warm-ups" style exhibited by the Korean team at the 2013 March NAC. Whaaaaa?
Here's a closer look at the fashion statement.
This was applied both to long pants (as above) and shorts (shorts, shorter, shortest?)
Now I'm not saying these gentlemen didn't have nice legs (they did), but really, is the purpose of the cutoff just to show off more of their well-developed gams? It wasn't even particularly hot in the venue.
Your speculation on this phenomenon welcome. As well as your pics of "fencing fashion I Do Not Understand."