I frequently cautioned my offspring about using hand-sign that might be misinterpreted. We Americans are acutely aware of 'the finger' but nearly none are aware of the 'unicus' gesture resembling the female genitals, or or the devil's horns or of the cuckold gesture or of any number of others.
Hell, we don't even differentiate amongst vulgarities, profanities and obscenities. They're all just 'swearing'. what Barbra Streisand.
The conspiracy of ignorance masquerades as common sense.
sorry.
The Norwegians, as well as other outsiders, have no business looking in on our culture and making assumptions based on THEIR stuff! It is silly and sophomoric at the lightest and dangerous at worst.