All Night in White Stains by Aleister Crowley.

“But raise no head; I know thee, breast and thigh,
Lips, hair and eyes and mouth: I will not die
But thou come with me o’er the gate of death.
So, blood and body furious with breath
That pants through foaming kisses, let us stay
Gripped hard together to keep life away,
Mouths drowned in murder, never satiate,
Kissing away the hard decrees of Fate,
Kissing insatiable in mad desire
Kisses whose agony may never tire,
Kissing the gates of hell, the sword of God,
Each unto each a serpent or a rod,
A well of wine and fire, each unto each,
Whose lips are fain convulsively to reach
A higher heaven, a deeper hell.” [via]