Sex is the essential part of relationships between a man and a woman. However, it is not about sex only. Love is much more. Some people think love is an emotion or a sensual thing. Such relations are doomed as life is hard. Things happen and being in love and in marriage you need someone to stick with you through hard and good times. You need to be loyal to another person in thick and thin. Otherwise, the relations would be pleasant, but short. We need each other the most during the tough times. That is what love is all about.