Itchin on a Photograph Lyrics

Lyric discussion by BrianNIL 

Cover art for Itchin on a Photograph lyrics by Grouplove

Just have to comment on how maddening the phrase "itchin' on a photograph" is. These words put together could only make sense if he meant scratching instead of itching, which he doesn't because he says scratching in the next line! The only thing I can possibly discern is that he had an itch when the picture was taken of him. There's just no getting past this line for me, help!