Different cultures have different wedding rituals. For example, at traditional Jewish weddings, the groom steps on glass and the guests shout "mazel tov!" Some weddings have two brides, and the brides dress to look as awesome as they feel. It is a custom that spans cultures, however, that only the brides should dress like a bride. Guests who break this unwritten but obvious rule are shamed on the subreddit Wedding Shaming, and that's a warning for all guests out there who just happen to love white lace.