a) Gustave Courbet's L'Origine Du Monde (1866)
b) References "The Agony in the Garden of Gethsemane " (1590s) by El Greco?
c) The top of the rock behind Jesus become the nipple , while his head becomes the belly button
d) Jesus' upper body becomes the pubis, while a significant dark crease in the blanket that he's sitting on becomes the vagina
e) The cave becomes the left right thigh