Parvati
Positive aspect of Kali, also known as Uma or Durga.
One day while seated naked on Siva's lap Parvati was interrupted by some visiting rishis (holy men). The rishis sniggered and Parvati became embarrassed, so Siva declared that anyone disturbing them in the future would be turned into women. The rishis immediately stopped their sniggering and went on their way.
Adapted from 'A guide to the Gods' by Richard Carlyon
