For a detailed explanation, please see here. It's in Japanese.
https://note.com/plum_code/n/n7b9f561f23f8

This also works for gays

The concept also includes men. This Lora is required. I recommend setting the weight to 0.5~ as it will affect the style.
Subjectively "better" hentai [Illustrious ver]
Better(?) hentai - V1 pony

[Modifier] Female Gaze| Intimate couple scenes - Illustrious | Pony
Erotic Cuddle (Str8/Gay) - v1.0 - NAI | NoobAI Illus pony

The additional Lora supports Illustrious, so the category is set to Illustrious, but it can also be used with SDXL, although the effect is weaker. Also, if you do not use Lora, it can also be used with SD1.5

Heterosexual_couple

• SWF/60

• Sensitive/40: no Hentai

• NSFW/35: Normal play, Hentai

• NSFW_add/7: You must add Lora yourself.

• NSFW_Extra/7: pull down pants, naked, etc.

• NSFW_face/9: I've included some random stuff here. Please add whatever you like.

NSFW add:
https://civarchive.com/models/980388/lesbian-squirting
https://civarchive.com/models/1039836/lesbian-anal-strap-on
https://civarchive.com/models/738970/lesbian-strap-on-sex-in-bed

My favorite Wildcards Background
https://civarchive.com/models/823376?modelVersionId=941142

Option

(Heterosexual,loving coupl:1.2),muscular boy with petite girl,romantic

Option 2　If the boy's face is cut off, please add this

(focus boy face:1.3)

Option Negative

NSFW,(head out of frame,looking at viewer),

Example of input without wildcards
Please modify it.

{ 0.5::sad | 1::smile | 0.3::staring },

Example prompt I used

(focus boy,muscler 1 boy) ,Petite 1girl,(Heterosexual,loving coupl:1.2),muscular boy with petite girl,masterpiece, newest, best quality, absurdres, perfect quality, Ultra Detail 8k art, very aesthetic, perfect anatomy,sfw,romantic BREAK(red hair boy), boy wearing white sweatshirt,brown hair girl ,girl wearing Shirt and red skirt,{ 0.5::__Heterosexual_couple/Sensitive__ | 1::__Heterosexual_couple/SWF__ },Bed room,legs out of frame,cowboy Shot,From below<lora:ilbetterh:0.5>