My son is 13 and I was told not to pull it back and I never did. I think that he figured it all out for himself though (the curiosity of little boys!) even though I told his dad it was his job to discuss that one...lol. I just always said to him to make sure he washed it properly. He's never had any probs at all. Funnily enough though my mother dared to argue this very topic with me only a few weeks ago (in case I have another boy) that "oh no you have to do it from the start!" I said mum, no you don't but she didn't believe me anyway.. lol. It makes you wonder how we're ever supposed to know what to do when there's so much conflicting information. I think when it comes down to it, instinct and mother's intuition is the way to go