I was watching a movie alone when there was a kissing scene and instead of looking away I watched it. But other than my parents no one has said watching kissing is haram. So my question is, is watching kissing (kissing on lips) haram?
Yes it is Haram! Any act has a bad scence which they call those days "+18" you can't watch it, Allah says in Quran: قُل لِّلْمُؤْمِنِينَ يَغُضُّوا مِنْ أَبْصَارِهِمْ وَيَحْفَظُوا فُرُوجَهُمْ ۚ ذَٰلِكَ أَزْكَىٰ لَهُمْ ۗ إِنَّ اللَّهَ خَبِيرٌ بِمَا يَصْنَعُونَ (30)
(30) Tell the believing men to reduce [some] of their vision and guard their private parts. That is purer for them. Indeed, Allah is Acquainted with what they do.
Actually the fact is not watching kissing scene... seeing a movie contains kissing scene is not good. But we see the movies for just its constructive content or creative story and have to do gymnastics in midth of the movie during a intimate scene...
I assume such movies character dress are not modest in most of the cases. So it is better for Muslims to refrain him from these movies.