Using online descriptions, the Lost Media Wiki tries to describe what Black Pudding looked like: 

Prompt: Animate a scene from ‘Black Pudding’ (1969) by Nancy Edell, featuring a giant vagina belching out strange and surreal creatures in a Bosch and Bruegel-inspired style described as ‘Released in 1969, it is said to be a seven-minute animated short with sexual imagery and representations of household items.’

Source: Lost Media Wiki: Black Pudding (lost pornographic animated short film; 1969)

Images below: 1-2 Unstable Diffusion; 3-4 Civitai; 5-6 Promptchan.