Another undergarment quest.

Morning girls!
I have a silly question....Do you have to wear a corset under your dress?
I mean, why would you wear a corset as opposed to just a bra?
Im clueless.
Someone enlighten me please
TIA

Oh, and where do you get them? Any brand recommendations?

Yes, it works as a good 'sucker' If you have a corset back dress, you may not need a corset since the strings on your dress can keep you nice & tucked. They're also good for pushing up your boobs a bit (or a lot) if you're smaller chested and want to look a bit more endowed.

not to mention that a corset is really nice looking