1) Quistes, however, doesn't seem like she would ever use it on you, which kind of kills the fantasy. Mitsuro, however, seems much more likely to get violent with you, escpecially if you saw the scene in P3 where she wants to 'execute' you.

I'd post the picture of Akihoko ball gagged and pinned to the ground by here right now, but even though it doesn't show any naughty bits, it might be pushing it a little much.