You just have to laugh

Just before I took this shot the conversation went something like this.

Dad sat down, put the TV on, and was in the process of putting on his headphones so that he could listen to the TV.  He's very deaf.

Rose to Dad: "It's very rude to put those headphones on when you've got visitors."

Dad, smiling and starting to laugh: "It is, isn't it."

Dad laughing and smiling puts his headphones on and settles down to watch TV.

He didn't have a clue why we were both falling around with laughter...  Bless him.