The age of 4: Mum knows everything! At 8: Mum knows a lot! At 12: Mum doesn’t really know everything. At 14: Mum doesn’t know anything. At16: Mum doesn’t exist. At 18: She’s old fashioned. At 25: Maybe Mum does know about this! At 35: Before we decide, let’s ask Mum. At 45: I wonder what Mum thinks about this? At 75: I wish I could ask my Mum about this.