Ya that's called usdefaultism.
That's why I no longer specify which unit of measurement I am talking about anymore. It's funny to watch Americans tell me I'm wrong.
"Ya that costs like 30 bucks" and they come screaming about how I'm getting scammed because it's only $20. Meanwhile I'm talking about CAD, not USD.
Or when I'm talking about temperature, cities, etc.
And if it's porn? Priceless.