Start with the I Feel Practice, not a conversation. Before you talk about sex, practice feeling together for ten minutes. Sit in eye contact. Breathe together. Say what you feel in your body: "I feel tension in my shoulders." "I feel heat in my face." "I feel nervous about what I want to say." This grounds both of you in sensation rather than narrative. It builds the contact that a productive conversation requires. The I Feel Practice instructions are simple and do not require any prior experience.
Use "I want" instead of "I wish." "I wish we had more sex" is a complaint about the past. "I want to feel your skin against mine tonight" is desire in the present. Complaints create defensiveness. Desire creates polarity. The I Want Practice teaches this distinction: expressing wanting without attaching blame, without attaching outcome, without making your partner responsible for your satisfaction.
Separate the expression from the negotiation. The biggest mistake couples make is trying to express desire and negotiate logistics in the same breath. "I want you" and "So can we have sex on Tuesday?" are two entirely different kinds of communication. Express first. Let the expression land. Let your partner feel it. Negotiate later, if negotiation is even needed.
When your partner shares something vulnerable about sex, your only job is to receive it. Not to fix it. Not to explain your side. Not to counter with your own need. Receive it. Let it land. Ask one question if you need clarification. Then sit with it. The single most destructive habit in sexual conversations is the immediate counter: "Well, I feel the same way about you." That is not connection. It is defense.