[Lucid:]

Those specific houses have everything to do with being a wizard though. it's like, "If I went to Hogwarts, what would my life be like? What house would I be in? What classes would I take? Which teachers would be my favorite? Which characters would I be friends with?" The house thing is just a part of the dream, but it does have a pretty big effect on Hogwarts social culture. It's not that we're like, "Oh hey, look, HOUSES! That's so bizzare, let's make a huge deal out of it!" It's really more like, "Oh hey, HOGWARTS! I wish I was a wizard going to Hogwarts, and I would want my life to be this certain way."