It seems to me that if you see something for long periods of time each day, for instance naked women, there will come a time when that thing becomes mundane and no longer has much effect if any on a person. Basically, that thing is not exciting any longer.
Another example: I saw a video of a Hasidic wedding, an arranged marriage where the bride and groom were basically touching for the first time when they held hands. The pure sweet wonder and transporting joy on both of their faces!!