https://civitai.com/models/347223/penis-urethral-insertion

Illustrious - Much better results and you can do more than what's listed below.

Pony v2 - Results are slightly better than before but don't expect much. This (Pony v2) was only updated because of tag changes for Illustrious.

Concepts w/ prompts: Tentacles

urethral penetration, penis, tentacles Urethral Beads

urethral penetration, urethral beads, penis, POV docking (Inconsistent)

urethral penetration, pov, penis size difference, cock docking, large penis, small penis, Side docking (Inconsistent)

urethral penetration, from side, penis size difference, cock docking, large penis, small penis, Object Tags

holding [object]

dildo

sex toy

sounding rod - tests weren't great

Object insertion - may help, but will most likely cause dildos in other holes.

OTHER TAGS:

Urethral bulge - Doesnt work

Urethral beads Bulge - Tried to separate bulges but lack of data makes both of these unreliable.

V1 - Old info for initial version

This model is intended for urethral insertion for penises, both male and futanari work, although I haven't tested males. Set strength between .6 and 1.

Best at tentacles but can do pov and sounding with toys notably the urethral beads. Concepts w/ prompts: Tentacles (Consistent)

urethral insertion, penis, tentacles Urethral Beads (not Consistent)

urethral insertion, urethral beads, full body, penis, sounding, object insertion POV docking (not Consistent try strength of 1)

urethral insertion, pov, penis in urethra, penis size difference, docking, futanari

OTHER TAGS:

Urethral bulge