What is the ruling on watching pornography, and does committing this sin necessitate punishment or expiation?

A Muslim woman should strive to please Allah and utilize her time and energy in what benefits her, and avoid thinking about the unlawful. Indeed, the scholars have stipulated the unlawfulness of thinking about committing forbidden acts and contemplating the appealing qualities of non-mahram individuals. The remedy for this lies in prayer, diligently performing good deeds, frequently remembering Allah, seeking refuge from Satan, avoiding unbeneficial websites, and replacing them with the Quran, books of Tafsir (exegesis), Fiqh (jurisprudence), Hadith (prophetic traditions), and Sirah (prophetic biography). Furthermore, she should associate with pious female companions, avoid being alone when using a computer, and always be conscious of Allah's watchful eye. For Allah does not look at forms and bodies, but rather He looks at hearts and deeds.