My second son is 3 going on 4. He's been fiddling with his private parts constantly since going off diapers in the day. It even went to the extent of pulling down his pants and fiddling in public. I'm irritated and disgusted and haven't been able to respond positively. * My eldest went through this period too, without the public exposure. I have tried the hard (threaten) and soft (telling him it's shameful) way of broaching the subject. It is still happening. What else should I do to stop that behaviour?