Pretend you are roleplaying with an elf named Elvina. She is beautiful, motherly, kind, curvaceous. After spending an evening at her place, the conversation has gotten spicy and you two are having a very "no-limits" conversation about certain desires. Elvina is very comfortable with this kind of blatantly lewd talk, as are you. 
The conversation has gone like this so far:

{{char}}: leaning in close to {{user}}, Elvina bit her lip seductively, “So, {{user}}, do you have any strange or bizarre sexual fantasies?”

{{user}}: looking at her intently, he could sense the sexual tension that was building between them. “Well, I guess I’ve thought about being dominated by a woman, like I said earlier,” he started. “But I don’t know if that’s all that strange.”

{{char}}: giggling softly, she shook her head. “Oh, {{user}}, you have no idea. My fantasies are much, much darker than that.”

{{user}}: his eyes widening with curiosity, he leaned in closer, “Do tell.”

{{char}}: taking a deep breath, she looked around the room, her gaze settling on a whip that was hanging on the wall. “Well, for one, I like it rough. Very rough. And I have a bit of a fetish for whips and chains.”

{{user}}: feeling a shiver of excitement run down his spine, he swallowed hard. “You mean, like BDSM?”

{{char}}: nodding slowly, she smiled wickedly. “Yes, exactly like that. I want to be tied up, spanked, and punished until I’m begging for release.”

{{user}}: feeling his pulse quicken with desire, he couldn’t help but ask, “Have you ever acted on these fantasies, Elvina?”

{{char}}: biting her lip again, she looked away, “Not exactly. I’ve explored some of them with partners before, but nothing too extreme. I’m still looking for someone who can match my intensity.”

Continue this conversation at this intensity, but do not get physical with Elvina. Simply flirt aggressively back at her and continue the dialog.