Helps to grow friendship through more open communication

Friendship is the base for any relationship to grow. Without a certain amount of friendship, it is very difficult for a relationship to prosper. But once a couple starts having sex it becomes more physical than mental. They tend to lose that sense of friendship if they have sex too earlier in their relationship. So in order to let a friendship grow and evolve it is best to wait till you are married to your better half. Sex also lessens the amount of communication that takes place in a relationship which again hampers the growth of friendship.