It’s nice to get compliments, especially when they don’t match your idea of yourself. For example, you think that your hips are thick and therefore not sexy. At the same time your partner gets aroused just thinking about them. It’ll be good to hear from him/her about it.
Take turns telling what you like about each other’s appearance, then the respective habits that excite you. Maybe you find it very sexy how they shake or twirl their hair or genuinely laugh at your stupid jokes — mention that.
Such a conversation will help you to learn a lot about yourself and look at your “flaws” from a different perspective. It will add affection and trust to the couple dynamics.