Oooh, what a great question. 😉 (Aww, don't worry, this is the fun part! lol ❤️)
So when it comes to any kind of romance scene, it has to do with the buildup. Where is the couple at this point? Is it desperation, longing and yearning, hurt/comfort, pure fluff and sweetness, raw, dirty, gritty desire, or a combination of these things?
And when they come together for that moment, is there a bit of hesitation, or even fear -- the idea that once they do this, there's no going back to the way it was before? Is the kiss tentative and sweet, chaste at first, or hungry and devouring from the onset?
Anticipation is also a big part of the first kiss especially. It's the culmination of a "will they, won't they," and it's a cathartic moment for a romance.
A kiss can start out small, just a meeting of lips. It can lead to more, as passion builds. You want to think of what emotions are driving each of them -- what defines their connection and chemistry, and this need to be together physically.
Word choice here can also be very important in how to convey passion, because again, "passion" can be expressed in different ways. To help figure this out, I try to visualize a scene in my head like a movie, down to the:
- Setting: Are they out in the open? Is there the threat of getting caught? Are they in the privacy of a bedroom, in the kitchen, couch, potentially knocking things about? lol
- Character "Blocking": The characters' physical movements in the scene, like the placement of hands, head tilting, movements of lips, teeth, tongue, bodies pressing, hand brushing the cheek, holding the hips or waist, hands cradling/caressing their partner’s face, hands slipping under layers of clothing, fingers tangling in the hair, gripping, pulling, or soothing, etc.). And of course, where on the body their partner is kissing, if they migrate from the lips after a while. 😏
- Internal Thoughts: "God, should we really be doing this?" vs. "Freakin' finally," etc. 😂
- Dialogue: Potentially breaks up the "action." Quipping remarks, teasing, heartfelt romantic words, sexy/dirty talk, etc. But sometimes there's no time for words, if you catch my drift. 😉
- The Emotions: The key to what's driving each of them throughout the scene.
Taking these into account (in my experience) can help you create a unique romantic scene. ❤️❤️
Thanks for the question, lovely. Let me know if this helps! 🫡