DS5 is 5 months old. He has up til now not been keen on 'tummy-time' so haven't really been doing it that much. But over last few nights he's not minded so he's been having a good old naked wriggle on his tum just before we get him dressed for bed. However tonight, as he was pulling his knees up underneath him I noticed that about 1-2 inches above his bum hole he's got what i can only describe as a 2nd bum hole!! It's not fully identical to it but it is a DEFINITE hole, no mistaking. I'll make an appt with GP tomorrow but does ANYONE know what this is/could be? Should i be worried?? He's a wonderful baby...no concerns really with any aspect of his health, so is it just natures little quirk?