If your partner shows that he or she feels contempt for you, or if you feel it for them, or if you both feel it for each other, that's not normal, and it's not part of a normal and healthy relationship. There's not supposed to BE contempt in a relationship, ESPECIALLY in a so-called "romantic" relationship. Parents are NOT supposed to feel contempt for their child, that's not normal or healthy, it's an indication of mental illness. And "romantic partners" are not supposed to feel contempt for one another either. Contempt is right next to hatred. Hatred is not a normal part of any relationship, EVER. If you have contempt for another person, you either need to get help for that specifically, or you need to be far, far away from that person and NOT be in contact with them.