The world according to Ben

Mark was having a talk with Ben and this is what came out of the conversation.....

Ben: I must not be old as I am not fat. Daddy you must not be old either as you are not fat.
Mark: But what about Mummy she is fat (I took a little offence to this comment)
Ben: That's ok, she has had babies so she is allowed to be.

So in short if you are fat, you must be old or have had babies. According to Ben.