In Jain Dharma, porn and self-gratification are generally considered violations of _brahmacharya_ and are also forms of _vishaya-vikar_ (sensual indulgence) that increase _kashaya_ such as kāma-rāga and attachment.

In simple terms:

• Porn: it strengthens lust, attachment, and unwholesome thoughts, so it falls under _brahmacharya-vrata bhang_ and causes _paap_ through passion.
• Self-gratification: it is also seen as a breach of brahmacharya and a cause of karma-bandh because it fuels desire and mental impurity.

From a Jain view, the harm is not only in the physical act, but also in:

• impure thoughts
• mental attachment
• loss of self-control
• increase of passion and bondage

So, in Jain classification, it is mainly related to _brahmacharya_ being violated, and it leads to paap through kashaya and sensory indulgence.

If you want, I can also explain this according to Nav Tattva or the 12 vratas in Jainism.