[WT Sharpe]

Gotta' be Leaves of Grass by Walt Whitman. Not only does it encompass just about every aspect of life, but in many passages, it's downright erotic as well.

Spoiler:

The young man that wakes deep at night, the hot hand seeking to
The mystic amorous night, the strange half-welcome pangs, visions, sweats, The pulse pounding through palms and trembling encircling fingers...

Hair, bosom, hips, bend of legs, negligent falling hands—all diffused .... mine too diffused, Ebb stung by the flow, and flow stung by the ebb .... loveflesh swelling and deliciously aching, Limitless limpid jets of love hot and enormous .... quivering jelly of love .... white-blow and delirious juice, Bridegroom-night of love working surely and softly into the prostrate dawn, Undulating into the willing and yielding day, Lost in the cleave of the clasping and sweetfleshed day.

The curious roamer the hand roaming all over the body, the bashful withdrawing of flesh where the fingers soothingly pause and edge themselves.

Sex contains all, bodies, souls, Meanings, proofs, purities, delicacies, results, promulgations, Songs, commands, health, pride, the maternal mystery, the seminal milk, All hopes, benefactions, bestowals, all the passions, loves, beauties, delights of the earth, All the governments, judges, gods, follow’d persons of the earth, These are contain’d in sex as parts of itself and justifications of itself. Without shame the man I like knows and avows the deliciousness of his sex, Without shame the woman I like knows and avows hers.