Just Because You Can Do Something, Doesn’t Mean You Should This has always been one of my favorite axioms for life and for entrepreneurship. Today’s example comes from Brad’s new running blog, and ultimately from an AP story reported in the Northwest Florida Daily News. The full story is here, but this teaser ought to get you hooked enough to click through, much as drivers slow down to see accidents on the other side of the road: Pain doesn’t defeat unshod marathoners Last month, after returning from an eight-mile run, Tsuyoshi Yoshino heated up a three-inch sewing needle until it turned bright red. Then, he says, he plunged the glowing instrument into the ball of his foot, puncturing a three-inch-long…