sex
because to obtain an endless supply of sex means i would have to become immortal. that also means that every lover i could ever be with would eventually die, so i would have to keep on falling in love with someone new each time. that is a wonderful thing because it means that by and by i would fulfill my greatest dream of all, which is to be absolutely intimate with every single human being that ever lived (but i'd only get them in their prime, because sex with old diseased folks would ruin the dream). then i would have concrete proof that every human being really loves me just like i love every human being, and i could finally be happy. even if it means being stuck doing it forever in order to immortalize my state of utopia, the truth comes full circle because sex is the one thing i would choose if i could have an endless supply of something.
what a wonderful thought