"DUCK WALK" ? LOL...it's how you're taught to walk in toe shoes. I guess it just becomes a habit. It's something I've never really thought about, until just now.
Yes, you have to position your toes outward. In Zelda Fitzgerald’s brilliant novel “Save Me the Waltz” she slept with her feet through the ribs of her foot board. That way her legs and feet would get used to being pointed in opposite directions.