My only-just five-year-old boy has begun grabbing his penis and squeezing. He does it through his trousers and it seems to be most prevalent when he is excited or keen to explain something. It's almost like a tic. Not medical. No itching. He just says "It feels good." We tell him now and again that he shouldn't touch it too much because it will get sore and it is private and he shouldn't do that in public. I don't want to give him a complex by barring this behaviour completely, so we are not hammering the message home. Will this pass? Any advice from parents of boys?