After having gone thru' all sorts of experiences in my life, I feel that it shd neither be permitted nor practiced. It is detrimental to the overall interests of not only the individuals involved but also our Society as well the offsprings(if any). Living-in relationship is just a result of our impatience to have physical pleasures & satisfy our Lust without caring for our long-run interests. Over the years the individuals develop guilt feeling, especially in Indian scenario as we have not been brought-up in western culture. Only a Desciplined & Moral life can give us a long-lasting happiness. Thanks.
