In the past, we've concentrated on what happens after a proposal: the wedding planning; the ceremony and the honeymoon, but the engagement period can be just as exciting. It's a time of transition from being a coupl e to becoming a married couple . And it's an rock-solid, unquestioningly legitimate excuse for a party, too. Fortunately, same-sex couples can break with the traditions that have constrained opposite-sex couples. There is nothing wrong with having a traditional wedding, but some of the 'accepted' norms are outdated, outmoded and, in some cases, particularly unsavory for the modern woman . Fortunately, we're moving away from attitudes insisting men shouldn't have engagement rings; that brides should always wear white; that there has to be a best man or that a bride can't invite a male friend to walk behind her during her entrance. Today, new traditions are emerging and there's now far greater emphasis on what makes you happy rat