Each painting is a snapshot of the time between the death of a human sentenced to eternal torment and just before it is compelled to be eaten and eventually shit into HELL proper by the HELLMOUTH.
These are 20 paintings out of 45 total.
...
Time doesn't apply.
HELLMOUTH is the portal to HELL, from which there is no return, no relief, no hope (but in a fun way).
HELLMOUTH is the name of the series, the name of the Monster (portal), and the name of the whole area.
The demons have to enrage HELLMOUTH to open its mouth thereby giving the damned a path to the throat.
The demons are genderless, the damned are generic looking, and there are various cameos which are noted on each painting.
The demons are photogenic and often will pose, wave hello, thumbs up, etc.