I am sure he's fine, but he could be refusing to wear a nappy because it hurts his bits. it might just be him being a typical kid, going against everything you do! remember they like to prove you wrong! dont worry, my boy refused to wear a nappy at 2, when we got down to the bottom of it, it was because they were making him hot! if it makes you happier talk to your GP. have any friends with kids in nappys? if you do, show your son how good they are wearing their nappy and reward them for wearing nappys xxxxx