Now I know there are many out there who will think I have lost it when I write that a key, new must-have for men this coming fall will be a pair of leggings to be worn outside, not just in, the house, but that was the big message at the debut Marni men's runway show this morning in Milan. Leggings made of microfiber cotton and wool, shown in violet, forest green and Milan fog gray, all of them with stirrup straps, except of course for a couple of them cut above the knee, accompanied half the looks in this...