The best settings :

Euler a

Checkpoint : WAI-NSFW-illustrious-SDXL - V14

steps : 25

CFG : 5

Clip skip : 2

Strength : 1

Prompt : Knot Bulges, sex, stomach bulge, knotted penis, knot in pussy, knot penis, knot testicles, full penetration of the penis,

Negative Prompt : EasyNegative, badhandsv5-neg, three hands, more than two arms, three feet, more than two legs, verybadimage, Negative v1.3, ng_deepnegative_v1_75t, ugly face:0.8, cross-eyed, sketch, worst quality:1.2, low quality:1.2, normal quality:1.2, lowres, unfinished, poorly detailed, censor, bad face, bad hands, bad feet, extra limbs, extra digits, missing digits, deformity, disfigured, malformed, amputee, several limbs, missing limbs, extra head, large head, long chin, distorted anatomy, bad proportions, blurry, monochrome, abstract, watermark, logo, signature, text, artist name, username, simple background, scan artifacts, jpeg artifacts, lossy-lossless, reference sheet, ai generated, official art, duplicate, skin spots, acne, skin blemishes, deepnegative, ((extra fingers:1.2)), back facing, tilt head, cropping, mutation, fused fingers, long neck, mutant hands, polar low resolution, bad body, overall proportions, (((testicles are visible))),