help! he is obsessed with wearing nappies after wearing pants for 2 + years! he gets physically excited when he wears one,likes to wee in it,goes very quiet into the bathroom or bedroom and spends a lot of time alone with it. It started some time after he went in to pants and i thought it was just a phase as the transition was so quick(no potty involved,straight from nappies to toilet and immediately dry at night)which was not forced incidentally,he was gently encouraged showing him his new pants every so often and asking if he wants to try them etc.......then he forgot all about wanting nappies again for a while and now he's worse than ever,am really worried that it will be with him like a fetish for life! i dont think anything is worrying him and he gets lots of affection....what should i do?