Remember that you're trading a fixed amount of happiness here for some sort of return (which might be less than the happiness than you sacrifice). What sort of

Remember that you're trading a fixed amount of happiness here for some sort of return (which might be less than the happiness than you sacrifice). What sort of happiness trades are you willing to make at that price? Intelligence that measures as a 15 IQ point boost? 5 million dollars? Everything's got a price. At some point, sacrificing those things IS worth the return.