I did a similar thing in Venice last year. I was in my black original UK walking through the Dorsoduro district and there was a young mixed gender group in an outdoor cafe talking and after I passed I heard, "Sir! Sir!"

I turned around and the girls were all trying to get one of their male inebriated friends to sit down. So I made the motion that said, "You're wondering what's underneath?" and they all giggled. I pulled it up enough to show that there was nothing but not all the way just so there was enough of a mystery still remaining.

I don't mind showing what's under my kilt, but I do prefer that it's *I* who do the showing and not someone who decides to take it upon themselves. That I find a bit rude but it may be just me...after all I don't walk up to women and pull up their skirt to see what's underneath.