With over 10,000 years of domestication, pigs have made their mark on most all world cultures, for better or worse. Although phrases such as eat like a pig and greedy as a pig are used today, the fortunes of pigs have risen and fallen throughout history. In ancient Egypt, for example, pigs were associated with the god Set. In ancient Greece, pigs were appropriate sacrifices for the goddesses Demeter and Aphrodite. Sacrificing a pig in Roman times required a solemn ceremony, while the Celts had a swine god. In somewhat more recent times, sailors thought pigs represented bad luck, due to their cloven hooves, and some captains forbid the use of the word pig at sea. In Germany, however, pigs symbolized good luck, and many European countries centered feasts on roasting a pig.