DS is 20 months old and in the last couple of months has developed a habit of sticking his hands down his nappy and pulling his penis out over the top. As I don't want to make a big deal of it from either a potty-ing or a body consciousness thing I have just been ignoring it but it is starting to drive me insane as he then wees and wets his trousers (and sometimes shirt) necessitating a change of clothes. Often more than twice a day.
Any idea how I can gently discourage this behaviour or is it just something that he'll grow out of?