A friend was doing some research and found this site. She thought of me (wonder why?) It has some interesting info, I liked the introduction (below)

The kilt has come to signify a natural and unmistakable masculinity, but it has a long history of outside intervention and deliberate reinvention. From its origins as the basic garb of the Highlander, Scotsmen and non-Scotsmen alike have embraced it as uniform, formal and semi-formal wear, and casual everyday wear. The kilt's ability to remain recognizable while responding to changing circumstances and consumer demands has been instrumental in maintaining its popularity through successive generations and, increasingly, throughout the world.