The dragon's hoard size makes the dragon bigger. I'm not sure what you mean about not being able to use potions, but for the Forest Knight the scene after complimenting him and grappling him only happens if you've impressed him at the gym
I was meaning the option of when you grapple the forest knight to fuck, there's two options "He's perfect the way he is" and "Use potions to make him bigger" but has a requirement of certain quantity of xp points, so I was curious about that
Oh, to get that option, he needs enough potions so that he could become bigger than you. So the greater the size difference, the more potions you would need
