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Direct Answer: Watching anal sex is a major sin in Islam, but it does not automatically make you a disbeliever (kafir) unless you believe it is permissible or mock the religion. However, it is a grave transgression that requires sincere repentance.
Explanation:
Islam teaches us to guard our chastity and lower our gaze. Allah says in the Quran:
> "Say to the believing men that they should lower their gaze and guard their modesty: that will make for greater purity for them. And Allah is well acquainted with all that they do." [Coran, Sourate An-Noor:30]
Watching such content is a form of the "fornication of the eyes" that the Prophet ﷺ warned us about. He said:
> "The son of Adam has been destined his share of fornication, which he will inevitably acquire. The eyes fornicate by looking, the ears fornicate by listening, the tongue fornicates by speaking, the hand fornicates by hitting, the foot fornicates by stepping. The heart loves and wishes. The genitals prove or disapprove that." [Sahih Bukhari & Muslim]
Now, regarding anal sex specifically, it is a severe sin. The Prophet ﷺ said:
> "Cursed is the one who has anal intercourse with his wife." [Sunan Abi Dawud, Ahmad, An-Nasa'i – Good hadith]
And in another hadith:
> "Allah does not look at a man who approaches a man or a woman anally." [Sunan At-Tirmidhi, An-Nasa'i – Authentic hadith]
These hadiths show how grave this act is. Watching such content is a step toward this sin and feeds the desires that lead to it.
Regarding kufr (disbelief): A person does not leave Islam simply by committing a major sin, as long as they acknowledge it is wrong and repent. The scholars agree that sins—even major ones—do not remove a person from the fold of Islam, unless they believe the sin is permissible or mock the religion. However, this is a serious matter, and you should not take it lightly.
What to do now:
1. Repent sincerely – Turn back to Allah with a truthful heart. Allah loves those who repent.
2. Stop watching such content immediately – Protect your eyes and your heart.
3. Seek Allah's forgiveness – The Prophet ﷺ said: "Avoid this filth, which Allah has prohibited. The one who commits it, let him conceal himself with Allah's concealment and repent to Allah." [Al-Hakim, Al-Bayhaqi – Authentic hadith]
4. Replace bad habits with good ones – Fill your time with Quran, prayer, and beneficial activities.
Practical advice: Use the Quran and prayer sections in your Al Muslim Plus app to strengthen your connection with Allah. Set a goal to read Quran daily, even a few verses, and make dua for protection from these desires. Remember, Allah's mercy is vast, and He forgives those who turn back to Him sincerely.
May Allah protect us all and guide us to what pleases Him.