I think this is @murreki?
Found it in my unsorted collection, just had to share.
My bad! This is Toddler Ben (http://little-toddler-ben.tumblr.com/). For a couple years I confused them- I figured Ben was a slightly older ID for Murreki (http://murreki.tumblr.com/). Both cute blonds who also happen to be excellent photographers. This is one of my favorite AB pics. I love when an adult can wear a diaper, and dress up like a baby- then look straight the camera, totally unafraid & comfortable with who they are.