Oh boy, this is a topic that's been on my mind for the last couple months. GS8 has reached a reading level & interest that books like 'The Giver' are options. I was telling him the plot of 'Fahrenheit 451' last night. But, he's really sensitive, and I've decided I'll be reading a lot of the books before I allow him to read them.
As far as conversation, it works both ways. He should understand that some people have no more desire to travel to foreign countries than he desires to follow football. He can either expand his knowledge of more common topics of conversation, or accept he'll have fewer things to talk about with fewer people. Either one is acceptable, the way I see it. He might have been able to engage in a little more conversation by discussing the Japanese restaurant, what items the guy liked, had he eaten at other Japanese restaurants, etc.
GS8 & I have a game that started accidently. I made an off-hand remark one day in response to something he said or did, I said, "You are so weird". He said, "Thank you". And he is right, it is a compliment! So, we compliment each other about our particular weirdness.