Why the big cock husband

Mom, dad and 10 year old boy eating pasta dinner. The boy was picky and would not eat. At one point, the father approaches the boy, he whispered something in her ear and proceeds to eat it all immediately and zbugheste in his room.
Mother, delighted father asks:
- You're amazing, what did you say? How'd you do it?
Father proud, replies:
- I said that if you do not eat everything, it will be small when he grows up.
5 minutes pass and pow! receives a spoon headed the wife.
- What happened?
wife:
- YOU WHEN YOU WERE SMALL, why do not you eat everything on your plate?