Benefits of reading, swimming, walking, playing an instrument etc. will go away too if you stop doing that thing. Biology rarely awards something "forever". Ma

Benefits of reading, swimming, walking, playing an instrument etc. will go away too if you stop doing that thing. Biology rarely awards something "forever". Maybe one day we can "fix" obese metabolisms permanently by killing off some receptors etc., but in that case, I would be afraid of intractable long-term effects even more.