You're not telling me anything I don't already know. The strongest weapons we have /right now/ have no implications for what we will have in the future. A million years is a lot of time. Long live the Earth! We cannot conceive of how we will contain the suns expansion, just like cavemen could not conceive any of our technological advancements mundane to us.
Now we just need something similar to https://github.com/nogasm with a different kind of "implant" that monitors my dopamine levels and optimizes based on that.
By the Transitive Property of the Monkey's Paw, I think you'd be in an endless loop of punching yourself in the face as the quickest and easiest way to release it.