This LoRA tries to improve mask-related concepts as a pose helper. This works for both Pony, but also related SDXL-based checkpoints such as Illustrious.

keywords and what they should (YMMV) do:

mouth mask - the subject matter

mask lift - mask removed upwards

mask pull - mask removed downwards, often with a finger

penis under mask - a penis being introduced under the mask, not necessarily just for fellation - training's a bit shaky here

fellatio under mask - oral sex performed on a penis with a mask on

cum on mask - the end result

The dataset had censors, so of they show up in your gens, you know one of the possible culprits...