Menstruation is painful, period. While the degrees of pain may vary from woman to woman, it is safe to say that the monthly 'red devil' causes some level of discomfort to everyone - especially on the first day. In view of this, Culture Machine, a Mumbai-based digital media company, introduced a 'First day of Period' (FOP) leave from July for its women employees, and they have now started an online petition to get their message across to the central government.