The jokes made about me when I worked in India were along the lines of "no American jokes - he'll sue."
It does extend a bit beyond the US, but it's not remotely universal. Similarly, my remarks about Indian perception of babymommas and family values aren't restricted to India, but are certainly representative of a big cultural gap between India and the US.
Pretty much any logical justification one could provide would be hopelessly based on other cultural practices and ideas, though I'd love to hear you try to cook one up that isn't (you might surprise me).