Buddhism and Being Human

If you decide to get off on this planet and get one of these things --- with ten little things on the end here and ten little things on the end there --- that grows for awhile and that you put old dead plants and animals in and mush them up in order to get it to move around: if you choose one of these things --- which you already have, its too late --- what is the nature of it?

It grows up, it grows old, it dies, it gets sick sometimes, sometimes it feels good and sometimes it hurts, there's pleasure and pain in it. Anyone has one that doesn't hurt sometimes? If you want that you got to go to another planet.