celebrities.* - includes pornstars and politicians newscasters etc any known real person.  Names are capitalized because they are proper names.

characters.* - Includes characters from shows such as cartoons.  Names are capitalized because they are proper names.

jobs.* - jobs and roles

Femdom.* - domination by females

Maledom.* - domination by males

Monstrosities.* - nonhumans

 'dom' is interpreted very broadly almost meaning 'active participant' in many cases.

Things can be in more than one category.  Some girl being spanked could be in both Femdom.ass and Maledom.ass if there's nobody but the spankee visible.  You can choose to imagine it either way. 

If a category is capitalized it means they are the active/dominant party unless it refers to a body part.  Then it refers to the body part of the passive/sub.   Eg: Femdom.mouth is probaby a woman being eaten out by another woman.  Femdom.Mouth means the 'self insert' is eating her out. 

I am a man so 'self insert' is from my perspective.

Femdom.Pussy doesn't exist because i am a man, so I don't have a pussy, but Femdom.pussy might exist because a woman can do stuff to another woman's pussy and I can fap to it. 

Monstrosities are Monsters (including 'Ugly People') but also any other nonhumans.  Ogres gets capitalized because sex with an Ogre is probably imposed rather than consensual.  But maybe Fiona in her ogre form when the camera is through Shrek's eyes could be in lower case ogres.