After trying to make it work, I'm not sure about how the functions tbh
1. [Optional] Edit keybindings in the FuckDojaCat.ini file to your liking (open with a text editor)
2. Install the mod; if there's no text showing up (top left corner) while in game, it failed to load
3. Press whatever key you bound for "ToggleGUI" to show the menu (it's clickable buttons)
4. If there's no button showing that reads "Perform selected intimacy" then either:
4.1. one or more of the selected character(s) are blocked for that specific type of intimacy, or
4.2. you need to undress / get your dick out first, or
4.3. you recently nutted and need to recover
In case of 4.1. I can't do anything about it, really. I've made an effort to include and allow all possible combinations of character pairings, unless they would result in broken or otherwise glitchy animations. This is to prevent people from complaining about visual bugs, which unfortunately are out of my control.