Sheikh Ibrahim Desai, the prominent Muslim scholar, states: “Allah says in the Glorious Qur’an, ‘And come not even close to Zina. Indeed it is obscenity and a most evil way.’ (Al-Isra’: 33)
Such pictures, rather than curb or fulfill the desire, are designed to increase it inducing one to further prohibited acts and finally Zina (adultery or fornication). This is corroborated by the hadith of the Prophet (peace and blessings be upon him) appearing in both Al-Bukhari and Muslim explaining the different categories of adultery: ‘Lustful glances constitute Zina of the eyes. Listening (to flirtations or lewd talks or songs) constitute Zina of the ears. (Licentious and lewd) speech constitutes Zina of the tongue. The (lustful) grip of the hand constitutes its Zina, and the movement of the feet (toward the act of Zina) is likewise. The heart lusts and desires. These are then either fulfilled by the private parts or rejected.” (Riyad As-Saliheen)
Moreover, these excesses sap and drain the Iman (Faith) of the believer so much so that the Prophet (peace and blessings be upon him) said, ‘The adulterer, during the act of Zina, is devoid of Iman.’ (Al-Bukhari)