I think your example of irony is incorrect. I don’t believe that a picture is more desirable, I believe those that have problems with porn, are unable to get a woman, or do not want the one they have. I doubt there are many users of porn, that want to look at pictures of women that look like their wives.
There are a lot of guys who don’t want the wives they have, or don’t like something about them. No image talks back, no image finds you inadequate.