Throwing things at a newly married couple is a very old tradition that may date back to ancient Rome or Egypt or even further back. The custom is intended to give newlyweds good luck, and most of the items thrown at the couple represent fertility and abundance. Food has always been a popular choice because it symbolizes plentiful crops. Seeds and nuts symbolize fertility because a little seed may grow into a big plant, an appropriate sentiment for a newly married couple. Grains such as wheat and rice were thrown over the newlyweds in the hopes that the couple would be prosperous and have many children to work the land.