He should've been honest, or at least lied to those fox demons and said that the Wind Scar only comes once. And when they all did the Heart Scar...that crocodile-gator-whatever-it-is demon must've hurt so bad since two of the fox demons bit his crotch O_O I didn't really like this episode, but it was hilarious when InuYasha tried to teach Shippo the Wind Scar xD As for Shippo touching Tetsusaiga, I think he could touch it because the Tetsusaiga trusted him...I remembered an earlier episode when InuYasha said that the Tetsusaiga could only be touched by people it trusts.