Acting A Little Touched

(My little brother and I have had touch screen phones for quite a while. Our mum is looking to get one.)

Mum: “So, how do you use a touch screen phone?”

Me: “By touching the screen.”

Mum: “But how?”

Me: “With your fingers or thumbs.”

Mum: “I get that, but how?”

Me: “I honestly have no idea how to answer that question.”