

NGL, it’s kinda creepy.
Edit: I feel bad for the flippant answer, so here’s a more involved one.
If it’s just an academic curiosity, I can understand that. Like, if you’re just wondering what all the fuss is about and how some people get sucked in and all that. OTOH, if you’re just lonely and trying to fill that void, please don’t try to date an LLM.






Back in the day, I worked in the corporate office for a retail clothing chain (IT department, so not down in the weeds), and I can’t speak for H&M like you gave as an example, but for the one I worked for we didn’t design anything.
We had a department of people called “buyers” who would work with various clothing vendors directly and wholesale bulk-purchase items for the stores. Their job was to basically figure out what was in style, what would sell, in which of our markets it would sell, and order them to stock in the stores. Not all stores carried the same styles/designs/whatever. e.g. We stocked college sports apparel only in markets near those colleges, our stores in warmer regions rarely carried winter apparel that we normally stocked in colder regions, etc.