1- I think it's the one where you go to the Brothel, treat Rose or Daisy roughly twice, and then go to the Square and lose. Lose to what? Well if you haven't seen it yet, that'd be spoilers. ;D
2- I think this is where you at some point encounter a guy that asks for a womp at the Square and you suck him off.
3- In the Mossy Expanse, you can encounter a pair of vampire sisters. I believe that's you beating them both.