Well off the top of my head, depending on the fetishes you've enabled there's the guards, the wench, the hulk/minotaur, the gladiator, the shopkeeper, the blowup dolls, Barbera, Patreon backer NPCs, and the aeromancer. That's just for the dungeon area. There's 4 more areas of the game with a completely unique set of monsters and NPCs in each area. Except for Barbera, who roams throughout the game getting into trouble. All of that is not even counting the optional bosses to beat, the different character classes you can become, and the hidden quest to finish. If you never left the dungeon you've got a lot of stuff to go find.
All that said, I can understand if you feel the core gameplay loop is a bit shallow. If you're concentrating on it the game is not that hard to win either. But really, who's playing this game to get out with your masculinity intact?