In Jainism, the guidance differs for monks/nuns and laypeople:

• For householders (married or with a partner): Sex is acceptable only within a lawful, affectionate marriage. It should be practiced with self-control, fidelity, and non-harm to oneself or others. Adultery, coercion, or exploitation is not allowed. The aim is to support a stable, non-violent family life and personal spiritual progress.

• For monks and nuns (ascetics): Celibacy (brahmacharya) is required. Sexual activity is not permitted.

There are minor differences in emphasis between Digambar and Shwetambar traditions, but the core stance is consistent: lay life permits sexual relations within marriage, while monastic life requires celibacy.

If you want, I can share a brief, respectful description of how sexuality is discussed in key Jain texts, or point to traditional practices for lay households.