apiphile - Ford/Arthur, keyword "gin". (Except I misread it as 'keyword "keyword"'. Ed.)
"What's the word?" panted Ford, grinning manically -- or maniacally, it was difficult to tell with Ford. "What's the word?"
Arthur spat out a mouthful of bed sheet and gulped a desperate breath of air.
"I'm not sure which dictionary you got your definition of 'safe word' from," he said, "but it was the wrong one."
foreverdirt - the doors on the Heart of Gold, orange
"Shut up or I'll jam an orange in your works," said Marvin.
"Tease," sighed the door.
stungunbilly - Arthur Dent/Ford Prefect, biodegradable mattresses.
"Ford," said Arthur from the floor.
"It's biodegradable," said Ford hastily. "You like saving the environment, right?"
"You mean, it was biodegradable," said Arthur coldly.
"Well -- yes."
"I think I'm going to have a headache tonight," said Arthur.