A couple of things lead me to consider this:
1) He is kind natured
2) He is chubby
3) I don't recall him being described as golden haired.
I could be way off base, but what if? I doubt there is any paternity tests in Westeros that would be accepted. Could put to rest all of the claims to the crown. Anyhow it seems like whoever can take power by strength is going to do it.
Edited by The Greenseer, 06 May 2012 - 10:58 AM.