Genuinely erotic writing isn't about fulfillment, it's about frustration, about the rising helpless obsession of people who haven't yet come together. That's why the key to most romance writing is figuring out how to keep your protagonists apart, not how to bring them together.

In the event, however, that you do need to write about actual sex, remember that it's both taboo and overwhelming for most people, so that's what the subjective experience of it needs to be for most characters. Talking about it obliquely, through metaphor, indirection, symbolism and double entendre is actually a more accurate subjective depiction of the topic. The direct and clinical rendering --superficially accurate --actually feels more artificial, because it doesn't match most people's subjective experience of sex.

This is an extremely good question and I would love to offer some advice from other writers I've found helpful! If you are ESL or new at writing romance scenes, your initial romantic scenes definitely have a high potential for being "cringe," and it's often difficult to pinpoint exactly why or where you went wrong. It's usually not because you aren't skilled as a writer - it's just because writing effective romance scenes is really, really hard.

This isn't a definitive list by any means, but here are some common mistakes I've found in romance writing that can lead to a scene becoming awkward or cringe-inducing rather than interesting and exciting.

Your romance scenes might be cringe-inducing because:

You forgot what readers are here for

Here's something that is worth keeping in mind when you're writing romance - unless you're specifically setting out for purely erotica, the vast majority of people don't read romance novels for the erotica. It's a fun bonus, sure, and a well-written kiss or intimate moment is exciting to read about, but that's not what readers are there for.

Why? Because they want to read it for the romance! The drama! The suspense! Will they get together or won't they? Will forces drive these two star-crossed lovers apart? That's what you want to focus on. Your reader wants to play a game with you of "will they or won't they?" and be excited to see where the romance goes next. They're not in it for the physical details, so if you focus on that part of it too much, your writing strays from exciting romance and becomes pure erotica, and it starts to get a strong hint of cringe.

You focused too much on the physical, not the emotional

Don't focus on the anatomy when you're writing a kiss or intimate scene. Instead, focus on how each character feels. How does this kiss make them feel? Why is it meaningful or special? What's unique about it? Is each character a good kisser or do they fumble or struggle? What conflicted feelings and emotions are going through each character's head? Those details are what make a scene good and engaging, not where the lips or hands are going - although those details are still worth including just to give the reader a good picture of how things are going.

You wrote the scene purely because "it needed to be there"

If you are writing a romance scene and you feel like it's cringe, or like it's not really fitting the story and the characters, stop and figure out why. What are you missing? Are these two characters not close enough or well-established enough? Did you not lead up to the moment clearly enough or build up to it and foreshadow it? Solve that problem first, and then try writing the scene again and see if it flows easier. There are many examples in media of romances that readers thought were established too quickly or weren't given enough thought and depth - think Rose and Finn in Star Wars, to give a slightly controversial example - and that often leads to unwanted "cringe" when the characters have romantic scenes together.

You are writing for the wrong audience

Another honest truth is that if you are writing a particular type of romance - let's say, an explicit mature romance that goes into great physical detail, or a gay romance along the lines of Call Me By Your Name, or a twisted, messed-up romance along the lines of Gone Girl or 50 Shades of Grey - you may find that people cringe at your writing simply because you're writing for an audience that isn't them. When you write romance, make sure you make it clear what kind of romance it is and what audience it is designed for, and think about what kind of reader you are aiming the story at. Market your book clearly and pay attention to how other romance books in your genre write their romance scenes. Try to match that.

Do you want a mature audience or a teen audience? Do you want the audience to be comfortable with an LGBT romance? Is it a Christian romance? How explicit does the novel get? Establish that right away so you can make sure your story is right for your reader, because if there is a mismatch, that can often be the reason for that unwanted cringe factor. If you are marketing your book as a young adult romance, and I pick up your book and discover it's much more explicit than most young adult books on the market, I probably would cringe at it too.