Who would have thought one could perform foreplay on fast food? That's what Padma Lakshmi seems to be doing in her new ad. The ex-Mrs Salman Rushdie and ex-vegetarian is making waves for using her formidable sex appeal to sell glossies, junk food and herself. Along with a highly publicised nude shoot for US magazine Allure - coinciding with her return to modelling at 38 - Lakshmi is now seen sucking, licking, nibbling ... a beef burger.