I've never used that topic even when it dropped from random actions, so not sure about easy, iirc it drops on some of Gina's AT when you talk about different sexual, perverted and sex-related stuff, but that is pretty far. Maybe you will have more luck with that Charli{n}e broad, she has open mind about that stuff, and people here tend to give that advice as well. Lisa may be a good option as well, since she is a stripper, and if she will like you, she will be flashing you those at some point, with this topic as an optional drop .
May I ask you why are you so desperate about this specific topic? Any crucial need to use it?