Rigdon says...

 Rigdon; So mom, When you are married at the beginning and you are both skinny and you don't eat very much, can you still have a baby?

Me; What do you mean, you can have a baby...

Rigdon; Well do you have to eat a lot of food to get a baby?...

Me; It dawn's on me what he is asking... How do you get a baby?

 Um, it can make you want to eat a lot of food when you have a baby in your tummy.