My son always (very frequently) keep a finger in his belly button. He does this many times in a day. I tried to avoid him doing that. I divert him in many ways, just in fraction of second he gets diverted. But again if he remembers that, he keeps his fingers. Even if I tuck his shirt, he pulls out and again same thing happens. (I didn't try scolding him. But I tried all the ways playfully). He doesn't have any infection or rashes or redness or anything like that. Please tell me what to do to avoid him doing that. Please do reply me.