In the non devotional world, where sex is the norm, the divorce rate, in many nations, is around 50%. So from that angle, the answer is no, sex does not assure one a successful marriage. And within ISKCON, where sex is discouraged, some estimate divorce rates are even higher. So, that begs a much larger question.
The Grihastha Vision Team surveyed couples and individuals in ISKCON to ascertain some of the greatest challenges in their marriages. Two top challenges emerged: 1. Lack of emotional and/or physical intimacy;