Some potential signs that your partner might be experiencing a lack of intimacy or sex in your relationship include:

Changes in Behavior
1. Increased irritability: He might seem more short-tempered or frustrated than usual.
2. Withdrawal or distance: He might become more withdrawn or distant, avoiding physical contact or intimate conversations.
3. Lack of affection: He might show less affection or interest in physical intimacy.

Communication Clues
1. Less initiation: He might stop initiating conversations or activities that typically lead to intimacy.
2. Avoiding physical touch: He might avoid physical touch or intimacy, such as holding hands or cuddling.

Physical Signs
1. Less energy or motivation: He might seem less energetic or motivated, which could be related to unmet physical or emotional needs.
2. Changes in appearance: He might pay less attention to his appearance or grooming habits.

Keep in mind that these signs alone might not necessarily mean your partner is lacking sex. Open communication can help you understand each other's needs and feelings.