Is sex really the main thing that matters in a relationship?

came up with this question becuase my other poll I had I asked is it ok to have sex before you are married and almost everyone said yes one person put you have to try something before you like it and then someone said marrige is just a piece of paper and when we talk about your dream husband (ladies) you would say somethin like i want him to have a big dick and great sex but where does love come in what if a man loves you and you can tell but because he is in a wheel chair you won't marry him because he can't have sex. Its like no one is even thinking that if you have sex before you are married you cant give your virginity up to someone you will be with forever and boys can say to your husband "well i already had her".