Lustify might not be the best Model to use, it has quite a strong bia…

Lustify might not be the best Model to use, it has quite a strong bias towards Female Main Character, it is best for solo female, or F/M and F/F sex scenarios, also, no need for "Scores" with Lustify (it doesn't use them). You may have more success with a Pony Model (such as Realism 2.2 used here). Pony has more Training Data for M/M sex. Pony does use "Scores", if you want, they help with Quality.