Why do people throw bouquets at weddings?

It's a symbol to show which wedding attender will fall in love next. Many times the brides maid(s) are in the front or in the back of the group, but that all depends on if the bride has a good arm. Whichever gives them a bigger advantage over the other attenders. Then at the wedding for the brides maid who caught the bouquet (assuming it was a bride's maid to catch it) the bride at the current wedding is the bride's maid for the upcoming bride's maid's wedding. It is a very well thought out tradition.