An Irish girl brought her baby boy to the doctor and told him "Doc, my little Paddy just cries and cries all the time. What do you think the problem is?"
Taking the baby from her, the doctor noticed a strong odour, where upon he looked into Paddy's nappy. "Why Mary!" He shouted, "The problem is that there is at least 16 pounds of yellow shit in your sons nappy!"
"No, that cant be it Doctor,"the girl replied "On the box it said 'Good for babies up to 18 pounds', so he's got at least two more to go!"