The complexity of modern urban society, with advancing information technology and rapidly growing communication and transportation networks, urbanization and migration within and across the country has made modern socio-cultural environment different from traditional one. Teenagers of today are reaching adulthood in a different way from the one in which their parents lived when they were teenagers. They are more likely to delay their marriage for education, employment and personality development and have more freedom and modern thoughts. They have more access to education, employment, mobile communication, internet and social media. So they are more likely to have friendship, affection, attraction and communication with the opposite sex. Adolescents or teenagers in many countries do not have adequate access to appropriate SRH information, education and services. As a result, teenagers are at a greater risk of unprotected sexual activity which may have several risks and negative sexual and reproductive health related consequences like sexual violence, unplanned or unwanted pregnancy or birth, unsafe abortion, maternal deaths, substance use, sexual transmitted infections and HIV/AIDS pandemic. Teenagers of today will be adults of tomorrow, their sexual and reproductive activities and health will play a vital role in determining future social structure, economic productivity, reproductive health and demographic situation. The environment in which adolescents of today need to make decision related to SRH is rapidly evolving. Therefore, they need to be properly communicated and educated on risky and protective behavior rather than just asking them for abstinence or delaying formal marriage so that they can decide, manage or negotiate their SRH choice freely and responsively before as well as after marriage. One fourth of population of Nepal is in between 10 to 19 years of age. With a large portion of the population reaching reproductive health age, full access to comprehensive, youth-friendly sexual and reproductive health information and services is more critical than ever. Educating them and increasing access to youth friendly SRH services to improve their SRH and well-being of teenagers is a smart economic move for any nation for sustainable development.