All that mass gotta come from somewhere…
This concept originally came from a combination short story/animation I created on Patreon whereby a girl asks a genie for bigger boobs but doesn’t realize that the genie strongly believed in the conservation of mass.
People enjoyed it, but some felt the shrinking scale could be better captured from a stationary camera (the original had a dynamic moving one) so I created this variation (I later also made one from her POV as well).