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A number used to measure how sexually attractive a girl is by comparing her butt to her waist. This also shows how big a girl's butt truly is. This is obtained by measuring the smallest part around a girl's waist and subtracting that from the largest part measured around a girls butt and thighs. The following A/W Ratios are in inches >0: Waist is bigger than butt, she must be flat and fat which won't look good at all. Fortunately this is rare (>5%) 1-5: Her butt is ok, this might not look good everyday and probably won't grab your attention. This is quite common (75%) 6-9: Her butt is pretty big, this is very noticeable and probably will grab your attention. This is quite uncommon (15%) 10+: Her butt is amazing, this looks unreal and might make you stare for a bit. This is also known as an extreme ass. This is extremely rare, and you may not see another one like this for months. (>5%) The distribution of the different A/W Ratios depends on booty geography
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