Master Frugal: I know how babies are made mam.
Me: Do you?
Master Frugal: Yes, the Daddy falls in love with Mammy when they go to bed and then he puts a baby in her tummy.
Me (breathing a sign of relief that the S word wasn’t mentioned): Aaaw
Miss Frugal (from the next room): Yeah but they’ve got to have sex first though you know!