Houses and Babies

John Thomas: "Mommy, why don't new houses have babies?"
Me: "What do you mean"
John Thomas: "Why don't new houses have babies like we do?"
Me: "Houses don't have babies, only mommy's have babies"
John Thomas: "My friend Jake, he doesn't have babies"
Me: "Ok"

I have no idea what he's trying to ask... Anyone have any idea?