gat, i don’t know exactly why it works this way, but it does, we are told by our gedolim that improper images leave a deep stain on the neshama, they come up in a persons mind when davening, and trying to concentrate in learning. It makes a lot of sense, its the pure tumah in the world that they saw, looked at etc. which has an effect on their learning, davening…basically ruchnius
although it doesn’t do the same thing to a girl, it does leave a stain on their neshamos too, and the images do stay etched in their minds. (i’ve read about this)
no one can come and say, “this is why kids go OTD” there’s no blatant rule however it is an idea, the article did have a point. Remember, all articles have to be taken with a grain of salt.