NEW DELHI, March 15 -- In Hindi, sexually transmitted diseases are coyly called gupt rog. They are treated as an illicit secret, and this unfortunate stigma allows director Rakeysh Omprakash Mehra to stage a most charming scene of courtship in Mere Pyare Prime Minister. In his new film, a young man takes a young woman, a victim of rape, to a clinic to get tested for STDs and, noticing her shame, announces he needs the tests himself. It is only after himself braving the nurse's condescension that he offhandedly asks the woman if she'd like to be tested as well, since she's there. This is chivalry at its most effective. Mere Pyare Prime Minister is an earnest fairytale, modest but far from memorable....