The hollow of the [[knees]]. Like [[armpits]] but behind the knee.

h4. See also

* [[armpits]]
* [[calf]]
* [[kneepit sex]]

h4. External links

* Pixivision: "A Hidden Fetish - Illustrations of Back of a Knee":[http://www.pixivision.net/en/a/2035]
膝裏 膕 ひかがみ 오금