Vidya Balan, the Bollywood star and ambassador of the Indian government’s programme for building household toilets, asks the mother-in-law who is busy toying with her bahu’s ghunghat at the wedding ceremony: “Do you have a toilet at home for the daughter-in-law to use?” Mum-in-law replies: “No.” Vidya then asks her, “Then why are you extending her ghunghat so much when you can’t provide her a toilet at home?” It’s the smartest ad for toilets. But is the message getting through?