I feel dumb even having to ask this. I recently made my first higher-end shoe purchase, which was the AE Bel-Air. Up till then I'd only worn cheap rubber-soled shoes. My size was always typically a 10, and from what I understand RTW shoes are always sold in D width to fit the highest number of people. So I bought the AEs in 10D. They seemed to fit well in the store, but after a few wears now, I realize they have a little "wiggle" room, in terms of both width and length. They're not loose, like flopping off, but I feel like I could've sized down in one or both dimensions. Also, after wearing them for a few hours the tops of the shoes at the creases rub against my toes, which I'm assuming should not happen. How exactly should a shoe fit? Can it fit well but still not be snug? Or should it always fit snug, like there's a slight pressure against the foot?