Are the groping NPCs only supposed to grope you once ever and then just awkwardly look at you once you try to initiate dialog with them second time? Because this is the behavior I'm observing with every singly NPC that can grope Honda.
This also extends to the NPC at the table 11 in the tavern, who, coincidentally, is the only one who - at least to me - seems like an NPC you are supposed to be able to whore yourself out to repeatedly.
Tl;dr you either failed to make sure groper event loops correctly, or didn't plan groping from any given character to occur more than once. Which doesn't seem to be the case to me.
I have not looked into the way scripting was done, so if any of this relies on Honda's stats (Lust, Desire, Intelligence, etc) you might want to check if setting them above 50 can break the script.
As some possible side issues, fiddling with the save files allowed me to see that Honda's stats (aside from Willpower) can go above 100 from ingame events. This may or may not be intended.
Also, none of the events currently in the game (oral prostitution in NW of town, prostitution in the tavern, giving 'flower') seem to be unticking the corresponding virginity switches in the save file. You might want to check this behavior if you plan on relying on those switches moving forward.