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Manipulating ones self is surprisingly easy in some ways. This is because emotion is a biofeedback thing. We always seem to think of it as purely a brain-oriented thing, but that's simply factually incorrect. To be happy, you have to be able to smile. To be angry, you have to flare your nostrils and furrow your brow and grit your teeth. People with total facial paralysis, for example, rapidly lose almost all emotional capacity. Eventually they are unable to even recall what having those emotions felt like. Experiments having people hold a pencil in their mouth (which forces your lips into a smile) showed that they experienced less negative emotion and more positive emotion when watching upsetting and funny videos respectively. This is why you won't see an AGI with emotions that lacks a body any time soon. What emotions are is fundamentally tied into the body. And through manipulating the body, one can significantly influence the subjective emotions felt.

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