I found this very interesting depiction done by Hildegard von Bingen, a catholic saint from year 1098 - 1179. Take a look at the picture and tell me if that isn’t a depiction of Kechari!! I believe it is. Incredible that a nun was doing the deed back then. 
https://en.wikipedia.org/wiki/Scivias
Sey 
I agree! Fascinating [OM]
Whoah. Thank you for sharing!