Because they are paying homage to a tradition and time when they were viewed as little more than property.
Why do women get married at all ?
Why does anyone get married? Misery loves company.
It's because, once they are married, they become ghosts of their former selves.
Eh...that's only true sometimes, I suppose.
I think it was meant to represent purity and the fact that brides were to be virgins. Ironically, the same standard wasn't applied to the grooms, who often wore black. Hmmm. Wonder why??
I actually heard it started because of Queen Viktoria wearing white on her wedding day and not because its a sign of purity.
something about purity and innocence, thats why the ones who are getting married for the 2nd 3rd 4th time wear OFF-white!