If you are a Bio-Monster, you might say: "Hey, thats great! A hyperthreading CPU - now I can handle some more eyes ... wow!" and go to get some ... and if you have not enough money for all together you might say: "Okay, some dog-eyes will do the job, too ... " Now if you are crawling around, more or less happy about your extended life and try to replace used up bodyparts with everything you can get on your never ending journey through space and time cause you don't have enough money for the replacement-shop you might say: "Well, a human heart may do the job, too ... " by Erik Kinting