Dom/Sub Universe, There is a secondary gender besides the one you are born with Dom and Sub.
Dom - Can command Subs
Switches- Can be both Sub and Dom
Subs - Listens to orders that Dom gives
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This should explain -
https://www.mangago.me/home/photo/15129568/--------------------------------------------
1-6 Dom/Sub Universe
6-83 Bdsm / Bdsm related content