Here are a list of codes that you can use for your stories on CSS.
This is a non-exhaustive list that we will add to over time.
MF – Sex between two adults – male & female.
MM – Sex between two adult males.
FF – Sex between two adult females
MMF – Sex between three adults (2 males & 1 female).
MFF – Sex between three adults (1 males & 2 female).
M+F – Sex between more than four adults (3 or more males & 1 female).
F+M – Sex between more than four adults (3 or more females & 1 male).
cons – Consensual sex
oral – Features oral sex (male or female)
rom – Romantic elements in the story
voy – Voyeur elements (likes to watch others have sex)
inter - Interracial sex (Usually black/white)
spank – Spanking for sexual pleasure
Futa - Hemaphrodite