Update: Starting to think most lewdness increases are broken. I've experimented with several things and then saved and checked the slave file. The only thing I've found that actually increases lewdness for sure is the slave orgasmic/fulfilling desires and it increases loyalty more. Nothing else seems to increase it. Prostitution/exotic whore has no effect, neither does partial nudity rule, aphrodisiacs + no cumming, or any repeated sex actions I've tried. Seems like it just doesn't work correctly right now unless I'm just fucking it up reading the save file.