Answer

In Jain Dharma, casual sex generally leads to the bondage of pāpa karma because it is connected with rāga attachment, kāma sensual desire, and often asaṃyama lack of self-restraint.

It can especially strengthen karmas related to:

• Mohanīya karma — deluding karma, because lust and attachment increase delusion.
• Vedanīya karma — feeling-producing karma, because indulgence in sensual pleasure binds karmas connected with pleasure and pain.
• Nāma karma and Gotra karma may also be affected depending on intention, conduct, and passions involved.

Explanation

Jainism does not judge only the outer act; it gives great importance to the inner state:

• Was there strong lust?
• Was there deceit, manipulation, or harm?
• Was there attachment or obsession?
• Was there violation of vows or discipline?

For householders, Jain Dharma teaches brahmacharya as limited sexual restraint, meaning sexual conduct should be disciplined, responsible, and within moral limits. For monks and nuns, complete celibacy is required.

Casual sex usually increases attachment to the body and senses, so it becomes a cause of karmic bondage.

Spiritual Understanding

The deeper Jain concern is not merely “sex” but passion and attachment. Lust strengthens the soul’s dependence on bodily pleasure and keeps it bound in saṃsāra.

From a Jain spiritual view, reducing sensual craving helps develop:

• self-control,
• purity of thought,
• detachment,
• inner peace,
• progress toward liberation.

Takeaway

Casual sex mainly binds mohanīya karma because it increases lust, attachment, and delusion. In Jain Dharma, the path is to gradually reduce sensual passions and practice greater self-restraint.