Watching porn is haram in Islam; it is a disease, not a remedy. The one who does that is afflicted and he should seek to remedy himself by repenting and giving it up, not by making up excuses for himself.

The fasting person is enjoined to fear Allah and to do what He has commanded, and to avoid what He has forbidden. Talking to the opposite gender does not break the fast but it takes away from the reward of fasting.

Shisha, argileh and smoking are all evil actions and are haram because of the harm they cause to one’s body and wealth. For more, see the detailed answer.