Comment Re:Training data (Score 1) 92
Americans especially never go to Iran, how could they, and have never been exposed to this culture outside of Iranians in the USA who are typically fully embracing american culture.
Don't believe the implication of TFS (and probably TFA, but of course I haven't read it) that this is a specifically Persian or Iranian thing. It's far more widespread than that. At the very least you'll find it across the Middle East and northern Africa; but also in Brazil (earlier this year I read an account by a Brit in Brazil of how they'd learnt to practise it), and I'm sure many parts of Asia too.