Marriage and wedding customs in the Philippines

The groom usually wears the Barong Tagalog during the wedding, along with the male attendants, though nowadays the wealthy opt to don Western attire such as a tuxedo. Weddings held within the same year by two siblings, usually sisters, called Sukob are frowned upon as it is regarded as bad luck. Some hold it that the wedding rings dropping to the ground is a portent of bad luck (this is usually said to the ring bearer to ensure that the child is careful in handling the rings). Money, in the form of paper bills, is sometimes taped or pinned to the groom and bride's dress during their first dance.

Source : wikipedia