I don’t think anyone has written this yet so I’ll put it down here:
Even if fics wrote ‘found the g-spot that made them see stars’, in actuality you need to stimulate the g-spot. Even if you found it, your partner won’t instantly see stars unless you had extensive . But also, if you allow the partner to come down from their high just a bit (like, the but you edged them) they won’t become hypersensitive after you enter them or massage the g-spot.

Basically — stimulate the g-spot, that’s all I got to say :’D

Here are just some basic things I've learned while writing :
1. Guys *typically* can't have more than one at a time. Well, they CAN, but it depends on their refractory period.
2. l doesn't last long. About 3-7 minutes. is what you want to focus on.
3. Morning wood isn't arousing. For most men, it's uncomfortable.
4. Women can get pregnant while on their period.
5. They now have birth control shots that are effective for about 3 months!
6. In Korea, guys usually live with their families until they're married. If they want to have with their girlfriends, they go to love motels which are essentially hotels where they give you condoms at check-in and they can have some pretty interesting rooms (I had one right behind my apartment when I lived there).
7. Don't be afraid to experiment! If you want your characters to play with toys, let them. If they want to use condoms or go at it raw, let them! Just make sure it's realistic enough so I'm not sitting their thinking "That's how how you use that..."

If I think of any other tips, I'll post again or you can PM me if you want :)

The following things are important to write proper :

1. It needs to be consensual!!!! Even if one of the two people involved may not be ready / in the mood at first at least display a form of change of heart along the way where its clear that eventually they consented to it. I read so many fics that turned out to be stuff or ual harrassment in general (can be just verbal too or threats a character can make). Its disgusting.

2. I feel like if you don't really have then it may not be wise to write about it. I know this is not what you wanted to hear. I'm near aual and demiual, so I got told a lot my scenes are already a bit on the short side or that the build up to the takes too long. Hyperual readers will not tolerate that if you label your fic as a fic. Maybe make sure to label your fics as 'slowburn' instead like I do.

3. Use some sort of humor or inside thing between the characters that is recognizable for the readers. Maybe they play into something that has been mentioned before in your story. But make sure it actually fits the scene and that it makes sense what they're saying.

I write yuri and not heteroual s but I think the key to writing a good is when you feel like it, I mean when you have the urge and your imagination is also working so hard.

You need a fully imagined content written down then revise it later on to make it better but it should be realistic and very graphic with the actions done by the characters.

Dialogues in are preferably s than figurative speeches unless you are describing the location and clothes. The s-x part must be graphic, every detail should be written or delivered as how you imagined the characters because one negative blow might ruin the whole reader's imagination.

It's hard to explain, I at explaining. XD

I think reading lots of stories might help, just keep in mind how they described s-x scenes.

I, myself haven't written a full-blown scene because I cringe and get uncomfortable mentioning and one too many times, but I can attest to what JaeKnight said. Readers usually noticed and react to dialogues (and ) more than 'she moaned louder than a passing train when he penetrated her' (<- that was an example. Promise I've never and will never write something like that in my stories lol)

Read a lot of romance novels xD

Im no pro but here’re my thoughts XDDD

I noticed if you want to get reactions like “thats so hot” etc during the act you gotta add even tho it’s unrealistic XDD
Im not sure———————but I think dont get too detailed bc some may find it disturbing than hot i tried getting detailed and i didnt get the reactions i was hoping for hahaha *whistles*

I'm sorry but I only write yuri so I'm not much help but maybe try skimming past this one.

https://www.asianfanfics.com/story/view/34545/wet--hard--a--tutorial