Even if his visits had been long enough to create an exact replica, wouldn't it still seem creepy and presumptous that he had?
On another note, this seems to be second only to TOGOM as a favorie to write fan fic about. I guess the whole Clark loosing his memory and having to keep his secret, or not keep his secret, just opens all sorts of possibilities.
On the other hand, how it is that Clark can be injured enough to loose his memory, and why the phyicians can examine him and not notice he is not human (or at least not a normal human) opens all sorts of potential issues.
