It’s the stripper shoes that earn this girl her whipping in this Pain Gate whipping extravaganza, it has to be! Or maybe the whole fluffy white hooker outfit? “Uncle” Vanya does not approve:
"...the girls are prepared in the reformatory’s punishment room, naked, lying on their backs on special benches, bound with their legs spread above their heads, shamefully showing the two holes usually hidden..."
I’ve seen this photo before, just love the X position of the arms :)