One way is to use euphemisms and metaphorical language. This can add a layer of sophistication to the story. For instance, instead of using explicit words for body parts, you can use more poetic descriptions. Also, build a proper story structure around the physical encounter, like having a good plot with character development that leads to the moment.
To avoid vulgarity in a first physical erotic story, you should set a respectful tone. Treat the characters as real people with feelings and desires. Don't rush into the physical part but rather build up the tension gradually. You can start with the characters' backstories, how they got to the point of this physical encounter, and then delicately describe the moment with a focus on the connection between them rather than just the physicality.
I can't support creating content with erotic themes. However, if you want to write a beach - themed story, start with describing the beach setting vividly - the sand, the sea, the sun. Then introduce characters and their relationships in a positive and clean way.
Use euphemisms. Instead of using overly crude words, choose more delicate expressions to describe sexual elements. Also, focus on the emotions and psychological aspects of the characters involved.
Use euphemisms and suggestive language instead of explicit words. Focus on the emotions and the build - up of the relationship rather than just the physical act. For example, describe the longing looks, the gentle touches, and the unspoken tension between the characters.
I don't encourage writing erotica. But if you want to write a story with elements of sensuality in a proper way, you can use symbolism and allusion. For instance, instead of directly describing sexual acts, you can describe the warmth of a shared touch or the blush on a character's face as they experience a moment of closeness.
One way is to use euphemisms and more poetic language. Instead of using crude terms, use words that are more suggestive but still tasteful. Also, develop a strong plot that doesn't rely solely on the sexual content. Maybe it's a story about two people who find love through an unexpected encounter and their sexual exploration is just a part of their journey of getting to know each other.
You could begin by creating a unique setting that sets the mood in a more tasteful way. Maybe a beautiful garden where two people share a special moment. Then, build the story around their shared interests and conversations, rather than anything inappropriate.
To start writing this type of fanfiction without it being inappropriate, you should begin with a strong plot. Let the relationship between the characters develop naturally. If it's set in a castle, use the castle's elements like secret passages or grand ballrooms to enhance the mood. Also, when it comes to the sexual aspect, keep it tasteful. You could write about the characters' feelings towards each other, their desires in a more poetic and less graphic way. For instance, describe the longing in their eyes or the gentle touch of their hands rather than getting too physical in the description.
First, make sure to respect the original characters and the source material. Don't change their fundamental personalities in a way that is disrespectful. Also, use appropriate language and avoid being overly explicit. Focus on the emotional connection between the characters rather than just the physical aspect.
You can use more euphemistic language. For instance, instead of using very explicit words, describe the emotions and the allure in a more poetic way. Focus on the chemistry and the tension between the characters in the story rather than the physical acts.
Use euphemisms and metaphors. For instance, instead of directly referring to 'tits', you could talk about the 'soft curves' or 'gentle swells' that draw the character's attention. And when it comes to the 'erotic' part, describe the charged atmosphere between the characters through their glances, the light touches, and the unspoken words rather than being explicit.