so, I went through everything I could think of, here's all the scenes I found:
- surrender to the incubus in Transylvania, lust doesn't matter
- defeat succubus teacher (random encounter in Transylvania, not in the classroom), have her grow a (mega) cock, lust doesn't matter
- losing to Gin (the catboy), you need to first get his lust above halfway, then surrender (or lose I guess); your lust doesn't matter
- as mentioned, the highwayman in the abandoned town - you have to get his lust above halfway, then lose or surrender; your lust doesn't matter
- Rinny offers to tail-fuck you, but it's the second tail option, the one when she's behind your avatar
- bull partner if you get your chest milked in the milker on the farm (you can do this with a flat chest, but it will still cause you to lactate; you can get rid of this effect with the milk pump from the nursery (bottom right in the city))