understanding lingerie

Never really have understood lingerie. It’s like pyjamas and it’s like underwear, but it’s not really either. Like they used to have cocktail hour. It’s like teatime but for cocktails. Fuck, if you want to have some tea, then have some tea. If you want to have a drink, have a drink. Why is there a designated time for it?
Maybe lingerie was a holdover from a time when women were just beginning to come out being suppressed or something and they needed an extra layer of formality as they got undressed. It just seems so artificial to me.
But maybe that’s the whole point. The illusion is what reigns.