Beauty in a picture surpasses that in a real situation. Again beauty in a rose may surpass that in a girl. Still the latter attracts and draws the boy nearer because the beauty in the rose is all, nothing more, but the beauty in the girl is not all, a lot more...
In other words, beauty is not all, something else needs to come along with the beauty. Similarly the advertising picture of a beautiful product needs something else inside the picture of the product...
For example, a picture of a mobile phone is cared but someone special within the picture is much more cared. In the same way, a natural beauty reflecting in the picture is similarly beautiful but someone in the same picture may beautify the picture even more...