Yes, Marx definitely wrote a lot about "western chauvinism." Perhaps you mean "social chauvinism?" Because it's definitely very confusing language for the under studied. Perhaps you should pick up some German language.
Again, I just can't help but be struck by the stark chasm between this liturgical internet "leftism," which seems confused between the principals of pragmatic worker liberation, versus the fantasy that Lenin's autocracy ever achieved anything noteworthy. But I guess populist fan service gets engagement, so who cares about results, right?
I'll let my partner know that you think they are a fetish. They'll get a kick out of it. If I was you I'd probably find your comment offensive.