I am someone who observes Karva Chauth out of choice. I don't do it for the longevity of my husband's life either. I instead pray for the longevity of the beautiful life that we have created together. I have never put henna on my hands nor have I dressed up like a bride on the day of the fast. I do not see the man through the sieve when the moon comes up. Looking him in the eye under a moonlit night is far more romantic.