In Jainism, sex is not considered a spiritual ideal. It is seen as part of attachment and sensual desire, which increase bondage of karma.

• For householders, sexual life is generally accepted within marriage, with restraint and responsibility.
• For monks and nuns, it is completely renounced as part of brahmacharya.

So, sex is not “Jain” in the sense of being a virtue, but for lay Jains it may exist within a disciplined married life.