The corsets are actually stemmed from the victorian era. At that time, women wanted to have a curvy figure, so the corsets were used to help construct their slim figure. They pursued such figure at the cost of their transformed internal organs. As the time went by, the dressing idea had changed. Women will not be restricted to the over curvy figure. The corsets now are not that tight. Women wear it for the beauty and sexiness it shows.
Victorian style clothing has a long history. There are some reasons for that it is kept till now. In the corsets, the gorgeousness and the sexiness are the most features that make it a fashion in nowadays.