Isn't this the perfect cake for a Spanko bachelorette party? Or even a stag night? I think a little pink sugar on those cheeks would make an even better statement.
They seem rather obviously round, with clearly-defined edges. Sort of like bumboobs. There isn't much difference between the before and after pictures that I can see, although the feel would probably be different.
Either way, the model still looks way too emaciated to enjoy a good spanking.