Not My Model, downloaded from here: https://civitai.com/models/1571666/slutificationsissification-for-pony

The best setrtings for this model are :

CFG:4

Steps :25

Sampler: Euler a / DDIM

Aspect Ratio : Landscape

For Slutification

Build your Prompt Like this :
slutification,sequence what should be seen in the first picture/pictures BREAK what should be seen in the last picture/pictures

For Sissification

Build your Prompt Like this :
slutification,sequence genderswitch 1boy/man, Cock, what should be seen in the first picture/pictures BREAK what should be seen in the last picture/pictures