The concept for the chart makes sense, it's just an abstract visual metaphor that isn't articulated totally perfectly. That's fine and all, except people on the internet tend to take things very literally. The idea of having one feminine leg seems a bit absurd, so Tumblr took to doodling and had some fun with it. Tumblr is a madhouse of MS painting with Bob Ross and lessons about physics and car safety, so you never know exactly what to expect.
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