Okay, sure. So I take it that you think Madara is an incorporeal "ghost" of some kind? Or do you think he has a (that is, some) body? Either is plausible, considering his space-time jutsu and the fact that he has only been shown fighting chakra creatures. If it's the latter, I still don't see how having his corpse would help, for the reasons I posted above.

Personally, I think that Madara is still using his original body, and that his space-time jutsu has kept him young -- via some mechanism like having stopped existing in "our" space-time for long periods of time. Heck, if he phases in and out of space-time quickly enough, he could be "flickering" faster than "we" could see, and presumably age at a significantly reduced rate. For a real life example, consider that fluorescent light bulbs are OFF more half of the time, despite it looking like it's on 100% of the time (to us). The flicker is faster than our eyes can react to. If Madara flickered that fast, he would be out of our space-time (and so not aging, I presume) more than half of the time he was "alive" by normal standards.

It's not like Madara looked like a kid when we saw parts of his face. He looked comparable to Danzou when we saw him.