Now I understand your question a bit more.
I don’t know if I should use food as an analogy to sex. Think about how you feel when you have a great meal in a restaurant that cooks just the kind of meal you like, and when you have a meal made by your mom or your partner. (I said mom because we all love our moms.) Your mom or partner probably doesn’t make the best food but you still love her/him. If your mom or partner makes the best food, then you probably will love her/him more. But if your mom or partner cooks really badly, you still won’t leave her unless the emotional bond is not strong enough.
Having the kind of meal you fantasize in a restaurant probably would make you fall in love with the cook if the cook happens to be attractive, you probably will consider marrying her/him, but if you two don’t get alone in other areas of life, then you probably would want to move on and give up the food before the emotional bond gets strong.

I know sex is completely different from sex. Through sex, both parties give bodies to each other. The question is much more complicated than food. I try to simplify the question by comparing it with food.

To me, food is not extremely important unless it is toxic.
I guess what is important in sex is the passion, isn’t it?