where he must have got his sons to explain what a "mobile phone" is
Which reminds me of an outstanding sketch from Not the 9 O'Clock News.
Barrister: And I will demonstrate to the court that my client is not guilty of theft and can, indeed, produce evidence to demonstrate that he, on the day in question, purchased the microwave oven, the-
Decrepit, out-of-touch judge: A-a-a-a mi-cro-wave oven? Kindly explain, what is a mi-cro-wave oven?
Barrister: Uh, M'Lud, it is a modern convenience, which cooks one's food far faster than an ordinary oven.
Judge (chewing his gums): Ah, ah, I see, how very sensible, yes, please continue...
Barrister: ... Receipts for the microwave oven, the automatic video recorder, and the-
Judge: Ah, ah, one moment, could you explain to the court, what is an automatic video recorder?
Barrister: It is a device, M'Lud, which enables one to record a television programme, so that one may watch it later, at a more convenient time.
Judge: Well, well, what a capital idea. Whatever will they think of next? Please, do on...
Barrister: ...the microwave oven, the automatic video recorder and [eyebrows vanishing into hairline] the deluxe model inflatable woman, whatever that may be-
Judge (suddenly perky): Ah, the deluxe is the one with the real hair and the fishnet- [COURT IN UPROAR]
Apologies for lowering the tone, but that sketch has made me laugh for the better part of 40 years.