Because not everyone wants, or even feels comfortable, wearing a look-at-me dress
Here are a couple dresses you could look at to give you an idea of what we are talking about
Design: V-neck front and deep V-back, sleeveless, gathered waist, back zipper, side pockets
Sure its an elegant/refined kinda casual not something to wear while hitting a dive bar with pals, but maybe something to wear when you feel like kicking it up a notch for your significant other
Style Code: LKZM6 Chic yet cozy, comfortable and classic, a sweater dress can do it all
A waist stay is a sturdy interior ribbon (usually made of non-stretch petersham), fastened securely inside the gown at the absolute narrowest part of your waist