[throwaway2202]

I can’t recall having the sour variety of lemon in Iran. There’s lemon (english lime), and there’s sweet lemon. Well, it is only sweet if you have it in the first couple of seconds after opening. After exposure to the air, it doesn’t taste that great.

[bafe]

That's exactly what my wife said too, the limoo shirin is only sweet just after peeling/juicing and turns bitter fast. I looked it up and looks very similar to the "standard" yellow lemons we get in Europe, mostly grown in Spain and Italy. However she's adamant that they don't taste the same