Questions About Pleasure in Visual Senses

I'm wondering if Buddhism has any notion of visual defilement. What I mean is that in Christianity, there are notions of one's purity or person corrupted by pornography, lustful gazing, etc. Is there an equivalent in Buddhism? Also, if a person perceives pornography or gazes lustfully, is this sufficient to be a kind of attachment if there is no action or consequence? I.e. What is the consequence of visual pleasure without further action? What is the consequence of perceiving a pleasurable sight *without* intention, e.g. mindfully? Thank you. PS: What is the scope of such pleasure compared to say orgasm or eating? Is there a pleasure specific to vision, e.g. one becomes accustomed and insensitive to visual pleasure specifically with overuse? (But not, say, other sensory pleasures)