“La Prière” [1], 1930 is a black and white erotic photograph by French surrealist Man Ray. It shows the buttocks of a woman, through her legs extend her hands with which she shields her sex. Her hands are folded in the manner of a prayer, hence the title.

Google gallery of “La Prière”.

Digression #1: Now I Lay Me Down To Sleep: a macabre prayer/poem for children:

Now I lay me down to sleep,
I pray the Lord my soul to keep;
And if I die before I wake,
I pray the Lord my soul to take.

Digression #2:

Maria Magdalene praying by Ary Scheffer