This game does not explore the amputation fetish at all. It's just the lewdest conclusion is a woman turned onahole, just a fuckable, silly horny torso. There are no scenes involving amputation as such, so the fetish focus is not about removing limbs, but reducing an object of male lust into drooling orifices and not much else. In a similar way, a lot of porn video clips crop women into onaholes, with framing so tight the viewer does not see a performer's face (unless it's a blowjob scene), or their entire body - just the genitals or hands playing with them. That's basically what this game alludes to - sexual reductionism.