D. H. Lawrence

She clung to him unconscious in passion, and he never quite slipped from her, and she felt the soft bud of him within her stirring, and strange rhythms flushing up into her with a strange rhythmic growing motion, swelling and swelling till it filled her all cleaving consciousness, and then began again the unspeakable motion that was not really motion, but pure deepening whirlpools of sensation swirling deeper and deeper through all her tissue and consciousness, till she was one perfect concentric fluid of feeling, and she lay there crying in unconscious inarticulate cries. The voice out of the uttermost night, the life! The man heard it beneath him with a kind of awe, as his life sprang out into her. And as it subsided, he subsided too and lay utterly still, unknowing, while her grip on him slowly relaxed, and she lay inert.