Finding the perfect little black dress take serious man hours, eh, woman hours, according to a new survey.  Research published by Daily Mail shows the 'LBD' takes the average woman roughly 30 hours of shopping to nail down. That adds up to about six hours a day of searching for five days straight.  However, after locating just the right little black dress, the majority of woman said they wear it only once.  8 out of 10 ladies say they own just one perfect 'LBD' and that their wardrobe would be incomplete without it.  Meanwhile about half are still on the hunt for theirs.