Retail experts have recently coined a new phrase that refers to the buying habits of some women in their 40s and 50s. They call it "10 years younger syndrome". This term describes the tendency of well-off women over the age of 40 to dress exactly like women ten years their junior. It has become commonplace for mothers and daughters to shop in the same store -- a thought that I would have never entertained back when I was a teenager.I hesitate to say that this means that older women simply aren't "dressing their age" -- I think they are. It's just that the term "age-appropriate" doesn't make that much sense anymore. In an time when 20-year-olds are wearing couture (the Olsen twins) and 45-year-olds are wearing low riders (Elle MacPherson), it seems silly to draw those distinctions in the first place.