Proud father

When his wife gave birth to a healthy baby, a proud father went in to work and told everybody that he has a 10Kg healthy son.After hearing what was going on, the wife tells the father to quit telling everybody that the baby is 10Kg because he’s only 4 Kg.Next day at work, the father comes in and tells everyone that the baby is only 4 Kg.“What do you mean, he was 10 yesterday?“ „Umm, well that was before he got circumcised“.