This probably doesn't apply to us smaller guys, who just need to get bigger all over, but I've heard a lot of big guys say that certain muscle groups can never be too big, as far as symmetry goes. Generally, this applies to medial deltoids and lats, although I guess the argument could be made for forearms and calves as well(you aren't likely to get forearms that are too big for your upper arms, or calves too big for your thighs). Often, these same guys throw in extra work for medial delts and lats for this reason. What do you guys think? Can these muscle groups get too big, or should everyone just work the hell out of them?