What is the ruling on watching kissing on the mouth, and what is the difference between it and kissing on the cheek or head? Is it considered forbidden if it is for the purpose of arousal? And is it permissible for a married woman to watch it?

It is not permissible to look at scenes of kissing between men and women, whether on the mouth or the cheeks, and whether the viewer is a man or a woman. This is because these actions displayed in films and TV series are forbidden (haram), and anything that is forbidden is also forbidden to watch. Lowering one's gaze from what is forbidden is among the most beneficial ways to protect one's chastity and purify the heart.