Quote - Sex sells, so that's why you will find a lot of lingerie and skimpy outfits for Victoria 3 and other female figures.

I think it also has something to do with the limitations of the program. Underwear and other small peices of clothing are generally easier to pose. Poser doesn't handle cloth very well in it's current version, and so any large and elaborate peice of clothing may look strange (for instance having a woman in a long dress sit down on a chair).