I was thinking about what mannerisms my favorite RPers have their characters do that really get my character to respond and get me all mushy. So I thought it might be interesting to compare people's favorite romantic mannerisms (or actions, or gestures). Klingelton iphone 14 herunterladen

I'll start:

One of my favorite romantic mannerisms is...when a character admits they have feelings then shows vulnerability and fear of rejection by looking away and blushing.

I don't know what it is about that, but my characters tend to find that so absolutely adorable and will walk 1000 miles and back for that character in that moment. It's so beautiful.
Those mannerisms seem so very useful in the romance genre
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Sounds like this would be better fit for the Roleplaying Discussion section.

I like things that aren't classically romantic.

There's one set of characters who hate each other and bond over beating the shit out of each other (it's mutually consensual. If furniture isn't breaking, they aren't having fun), yet there's an odd sense of understanding and respect between them. They have secret gestures and codes that basically translate to, "I'm in the mood," and the other will accommodate. They also do it in a way that none of their friend group guesses they sleep with each other, because again: mutual hatred. It's complicated.

Another set of characters are happiest when they sit on the couch and read books together. Sometimes, they'll turn the page in the other's book for them, and it's so precious how in-sync they are with each other.

I once had a threesome that enjoyed riddle-speak. All three of them were kinky freaks (BDSM, with a dom, sub, and switch, and the dynamics were quite varied), but it was the riddles they told each other/answered that got them all flustered/turned-on/appreciative/etc.

Probably more, but those are my best examples.