Asking a question like why sex is important in marriage is like asking why water is important for our environment. The answer is simple water is an essential component without which our environment will be parched dry and finally succumb to death. Similarly a marriage without sex will first become dry with no excitement whatsoever and then finally succumb to dryness.
Sex is that important water that keeps marital environment green and full of life.
This said, sex is not the only thing that keeps the marriage alive, in fact it is just one of the components, other than communication and understanding, but its absence in marriage can destroy it.
Although in our Indian society sex is still considered taboo which makes it a bit difficult for people to come out in the open and talk about it openly either with their partners, or with their friends thus increasing the divorce rates. However, there are couples who are trying to come out of their shell, are breaking the norms and understanding the importance of not just sex but sexual intimacy between them to keep their marriage young forever.
Considering the amount of time we are taught that sex is not important part of relationship as children, we grow up all the more confused. Hence in my opinion it is necessary to properly educate people that having sex is not bad for marriage in fact it is that essential component that will keep you and your spouse together forever.
Couples should understand the need for communication between spouses for better intimacy in the bedroom. If the man and wife are not comfortable outside bedroom they can never be comfortable in the bedroom.
They need to understand that sex is important to a marriage because it creates a bond not only at a physical level but also at spiritual level. As it does not necessarily mean intercourse, which is what most of us understand when we talk about sex. However the reality is far from different. If we look at sex it is in fact all about touch a touch that arouses us to a level where we feel liberated from the worries of everyday life touch the sky and come back to the earth feeling tired but refreshed after a bad day at work.
Doesn't everybody enjoy being touched? In fact there is a whole therapy dedicated to touch in medical science, Touch therapy. And touching is way to show another person is appreciated, loved, and needed. And that is what sex is all about. Sex is the way couples appreciate each other, love, and revel in each other.
So if sex is all about touching your spouse intimately and loving them with a little TLC then how can sex be a bad thing? In fact sex is glue that keeps the couples together forever, and that is why sex is important in marriage. Marriage without sex is a body without a soul. And moreover couples who enjoy good sexual intimacy can face any storm that befalls on their marriage.