a single drop of pure seminal yearning

Some of the finalists for Britain's Bad Sex in Fiction Award:

Villages by John Updike

A flock of crows, six or eight, raucously rasping at one another, thrashed into the top of an oak on the edge of the square of sky. The heavenly invasion made his heart race; he looked down at his prick, silently begging it not to be distracted; his mind fought skidding into crows and woods, babies and Phyllis, and his prick stared back at him with its one eye clouded by a single drop of pure seminal yearning. He felt suspended at the top of an arc. Faye leaned back on the blanket, arranging her legs in an M of receptivity, and he knelt between them like the most abject and craven supplicant who ever exposed his bare ass to the eagle eyes of a bunch of crows.

Faye took him in hand. He slipped in. He became an adulterer. He went for the last inch. She grunted, at her own revelation. His was that her cunt did not feel like Phyllis's. Smoother, somehow simpler, its wetness less thick, less of a sauce, more of a glaze. It was soon over. He could not help himself, he was so excited, proud, and nervous. When he was done, he opened his eyes, and saw this stranger's face an inch from his, seemingly asleep, the closed eyelids showing a thin pulse, her long lips curved self-lullingly.

Winkler by Giles Corren

And he came hard in her mouth and his dick jumped around and rattled on her teeth and he blacked out and she took his dick out of her mouth and lifted herself from his face and whipped the pillow away and he gasped and glugged at the air, and he came again so hard that his dick wrenched out of her hand and a shot of it hit him straight in the eye and stung like nothing he'd ever had in there, and he yelled with the pain, but the yell could have been anything, and as she grabbed at his dick, which was leaping around like a shower dropped in an empty bath, she scratched his back deeply with the nails of both hands and he shot three more times, in thick stripes on her chest. Like Zorro.

Blinding Light by Paul Theroux

The sound of his pleasure came slanting from deep within his lungs and seemed like an echo of a softer sighing in her throat. Her breasts were in his hands, his thumbs grazing her nipples. Her touch was surer and so finely judged that she seemed to feel in the throb of his cock the spasm of his juice rising - knew even before he did that he was about to come. Then he knew, his body began to convulse, and as he cried "No" - because she had let go - she pushed him backward onto the seat and pressed her face down, lapping his cock into her mouth, curling her tongue around it, and the suddenness of it, the snaking of her tongue, the pressure of her lips, the hot grip of her mouth, triggered his orgasm, which was not juice at all but a demon eel thrashing in his loins and swimming swiftly up his cock, one whole creature of live slime fighting the stiffness as it rose and bulged at the tip and darted into her mouth.