Nowadays it is not necessary to kill animals for fur. It used to be needed to due to the costs and labours of making fabrics and the poor qualities of those fabrics for winter clothes. They did not have the technology we have now to create fabrics that could withstand freezing temperatures and block out wind. Fur trade also fueled the economy in nortern most areas of North America during the colonial days. Fur trappers and their families made much money off selling the highly popular beaver furs to Europeans. I believe it also was an important trading resource between colonists and indians.
I suppose because some fur coats just look so damn sexy on a gal. And if you eat the animal WHY NOT wear its skin? I suppose too, one can just not buy a fur coat. (or leather jacket) but I tell you this: If I spend $5000 grand on a fur coat and some self-righteous jack ass want to throw red paint on it, if I can, I'll be kicking that individuals ass, BAD, as in hospitalization (STAT!) bad! (Even if it is a young gal/woman--SHE wouldn't need to worry about sexy anymore she'll look like a LIVING example of the Black Dahlia)
We shouldn't kill animals for their fur. It's wrong to kill innocent animals and use their fur to make things like coats and purses. The question you should of asked is: Why DO we kill animals for their fur?