It's much easier to get married, so you'll have the weekly task of going to the store by foot and bring back bagfuls of groceries, and possibly two packs of bottled water... then return there because you forgot two bags of cat's litter:)
More seriously, ages ago I wondered about a way to generate power by making sort of a (very compact) exoskeleton-like contraption for each limb articulation, so walking or using arms would activate some generators. Mechanical construction would be quite a challenge, however if built in a very compact wearable way it could become a thing: sensors for body parameters could self power, the phone in a pocket equipped with a inductive charger would charge while running, etc.
> so you'll have the weekly task of going to the store by foot and bring back bagfuls of groceries, and possibly two packs of bottled water... then return there because you forgot two bags of cat's litter:)
it's the "by foot" part where this may not work as you intended.
More seriously, ages ago I wondered about a way to generate power by making sort of a (very compact) exoskeleton-like contraption for each limb articulation, so walking or using arms would activate some generators. Mechanical construction would be quite a challenge, however if built in a very compact wearable way it could become a thing: sensors for body parameters could self power, the phone in a pocket equipped with a inductive charger would charge while running, etc.