Who are the best body punchers in the game at present - the three that spring to mind are Cotto, Margarito and Hatton?
Thats one situation in which I think the layers of blubber might actually help, they would certaintly absorb some of the impact
Margarito hurt him with a left hook to the body in the 9th round, that had him covering up for over a minute in the corner.
Conditioning helps but I've seen well conditioned fighters go down or be stopped by a shot to the body.
Anybody can go down from a body shot, if it hits in exactly the right place with enough power, around the kidney area In general, the fighters with the best conditioning will be the best at taking body shots. There is no coincidence.