Why do cartoons have Arnold Schwarzenegger parodies?

Why do some cartoons and animated series usually have cartoon characters that are based on Arnold Schwarzenegger? Like they're typically muscular with a thick Austrian accent and do one-liners. I mean in The Simpsons there's Rainier Wolfcastle, in Hey Arnold there's the Abdicator, in Doug there's... show more Why do some cartoons and animated series usually have cartoon characters that are based on Arnold Schwarzenegger? Like they're typically muscular with a thick Austrian accent and do one-liners. I mean in The Simpsons there's Rainier Wolfcastle, in Hey Arnold there's the Abdicator, in Doug there's Ronald Weisenheimer and in Fairly Odd Parents there's Jorgen Von Strangle.
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