“Just do whatever they do,” the Doctor advised when the aliens approached, sniffing curiously at them. “Give them a good sniff, it would be appallingly rude not to; it’s how they say hello.”
“So sniff when you’re sniffed at. Got it,” Amy said.
“When in Rome…” Rory added, leaning in to sniff at the alien who’d just sniffed him. It smelled quite pleasant, vanilla with a hint of lavender.
The Doctor paused his sniffing to frown at Rory. “We’re not in Rome, this is Verdinuncx.”
“It’s just a saying, Doctor. Means we should follow the natives’ example.”
“I knew that.”