Sketch 4a uses polarizers cut into strips to make black censor bars. Push a button, and one will rotate slightly, becoming transparent- exposing some obscene body part (but only for a split second- never enough time to ‘satisfy’ the gaze.  There are restraints imposed on how often the button can be pushed, as well).
The 2nd drawing is just for fun- various frivolous objects- clothing-like (or not)- make their way in front of a risqué photo, timed in a way so as never to reveal everything.