Eagerly anticipating a follow on study about cabooses, to include profile views. But include some sistahs, would ya?

To establish such differences you have to have a blind study of representative groups rating images of lips only.

A review of average lip sizes of models can never be reliable on its own and the logic used here contradicts itself. On lip thickness its concluded their is a focus on lip thickness because thickness of models lips is more than normal korean. On mouth width the opposite is concluded, koreans prefer smaller mouths despite the fact that korean models lips are wider than average koreans.

How can such conclusions be made unless the testing is of lips only without extraneous issues being excluded. Maybe bigger lips are gentically disposed to woman with bigger tits, and therefore the size of the lips is merely overlooked in favor of more obvious assets in choosing models.

Also where is the group of average caucasian women.