Junkmail,
With respect to the "hip-to-ear" ratio?
By way of background, the waist-to-hip-ratio (WHR) is a phenotypic cue to fertility and is indicative of โgood genesโ in women. It has been found in medical studies, by way of brain monitoring through MRIs, that males show activation in brain reward centers in response to naked female bodies with near to or close to optimal WHRs. Optimal WHR's have been found to be 0.65 to 0.75.
Hip to rear (ass) ratios - go one step further - not only must there be a good WHR but the ass has to be in proportion as well. We have all seen women with great WHRs but sometimes their ass is gynormous (fyi - urban slang for beyond huge) or odd in shape. To have a good hip to rear ratio or waist to rear ratio you have to have a good WHR and a great ass (ass is in proportion to hip and waist, not too puffy, not bow legged (i.e. and she does not walk around looking like she has a truck up her cunt, etc.).
Please feel free to PM if you would like additional clarification.