"Sex Mode" or similar phrasing is frequently used in meme culture (e.g., the "Goku Sex Mode" memes) to describe a character reaching an absurdly powerful or "thirsty" state.
Introducing new traits, such as preferences for specific acts. SexFeenModV1.1
It could be a niche "mod" or script designed for a "sex feen" (slang for enthusiast) to manage adult content preferences or bypass filters on sites like Nexus Mods . "Sex Mode" or similar phrasing is frequently used
If you have a specific game in mind (like The Sims 4 or Cyberpunk 2077 ), let me know and I can give you more details on the features of that version. FNF SEX MOD ACHIVE by GAME ACHIVES - Itch.io SexFeenModV1.1
Adding variety to in-game intimacy scenes.