Helpfully Yours

Tarb Morfatch had read all the information on Terrestrial customs that was available in the Times morgue before she'd left Fizbus. And all through the journey she'd studied her Brief Introduction to Terrestrial Manners and Mores avidly. Perhaps it was a bit overinspirational in spots, but it had facts in it, too.
So she knew that, since the natives were non-alate, she was not to take wing on Earth. She had, however, forgotten to correlate the knowledge of their winglessness with her own vertical habits. As a result, on leaving the tender that had ferried her down from the Moon, she looked up instead of right and narrowly escaped death at the jaws of a raging groundcar that swerved out onto the field.
She recognized it as a taxi from one of the pictures in the handbook. It was a pity, she thought sadly as she was knocked off her feet, that all those lessons she had so carefully learned were to go to waste.
But it was only the wind of the car's passage that had thrown her down. As she struggled to get up, hampered by her awkward native skirts, the door of the taxi flew open. A tall young man—a Fizbian—burst out, the soft yellowish-green down on his handsome face bristling with fright until each feather stood out separately.
"Miss Morfatch! Are you all right?"
"Just—just a little shaky," she murmured, brushing dirt from her rosy leg feathers. Too young to be Drosmig; too good-looking to be anyone important, she thought glumly. Must be the office boy.
To her surprise, he didn't help her up. Probably it would violate some native taboo if he did, she deduced. The handbook hadn't mentioned anything that seemed to apply, but, after all, a little book like that couldn't cover everything...