Sometimes the most thin, weak, ugly bodies provide some of the best references of the skeletal structure possible. A friend told me this once and it clicked. I don't even think of those areas anymore. They're just shapes!
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But yeah, I used to be in that stage once when I was that nervous to get too close, now I wish I did! I certainly gives you a better understanding of movement and form. I still can't get the hands right in my drawings.
That too! Always easy to draw them squat, blobby figures with nubby limbs and dot eyes.
EDIT: I will say thought I don't like seeing the same idea applied to animals. I get enough of that in reality, I don't like seeing in art, I suppose that comes out of the prudish thinking I get out of watching cartoons but I sorta like distancing any primary sexual characteristics from getting in the way of an adequate design.