Does a triple divorce occur if a man swears an oath of divorce upon himself, saying, "My wife, so-and-so, will be divorced by three if I ever again watch pornography online," and then he returns to watching it?

The majority of scholars hold that a conditional divorce takes effect upon the fulfillment of the condition. So, if you made the divorce of your wife conditional upon watching pornographic films, stating "thrice," and you watched them, then the triple divorce has occurred. Consequently, she becomes unlawful for you until she marries another husband in a valid marriage and he then divorces her after consummation. However, Sheikh al-Islam Ibn Taymiyyah held that an expiation for a broken oath (kaffarat yamin) is due if the intention was to prevent something, and a single divorce if the intention was to divorce. It is advisable to stay away from watching pornographic films due to their harms.