No. Define "mutual interest"?

If something in your culture benefits me, why does my use of it have to be dependent on that also benefiting you? Indeed if its a loss for a small people group but a benefit globally then surely that's a positive thing.

Would you for example argue lack of distinctiveness as a negative thing, in which case you could be blocking all sharing by demanding "mutual interest".

I don't want to be rude, pbhjpbhj, but I'm honestly not sure how to respond to that. I don't think I'm the right person to have that talk with you, and even if I am, this certainly doesn't seem like the right place or time.

Fair enough.

Though I'm interested if you can give specifics, like tell us what culture you identify with primarily and what aspects of that culture you want to keep for only people you identify as 'in' (belonging, if you will).

Maybe expand and show what you're foregoing from other cultures, like if you're not Chinese so avoid cultivated rice, or whatever.