I knew someone was bound to mention photoshop but my money was on Larry. If you want to go the whole hog on analysis, I guess you could seriously question the motivation for someone wanting to be photographed taking a dump in the first place, plus, surely if it was an 'opportunistic' shot, then the 'dumper' would have been eyeballing the lensman rather furiously.
"All I know is I woke up one day, and they told me my great, great , great, great, great, Grandma was Sak- a- ja- wea! She hung with a coupe dude's named Clark & Lewis, and was always on some kind of trip.