(gestures at nose
) is an old friend of mine. It tells me something smells."
"With sight, you meet a person. With smell, you meet their entire family."
Stage manager: "Can you really do that? Is your sense of smell that good?"
Wesley: Angel, you can't just sniff a person and know -
Angel: You had sex last night with a bleached blonde.
Wesley: Good Lord, how'd you -
It was well known that Vulcan females had a heightened sense of smell, as Trip had discovered after his last shore leave. The moment he stepped off the shuttlepod T'Pol had been there, sniffing in disapproval. "Commander, I sense that you've recently attempted sexual relations (sniff-sniff) with a Jhnarbi female in the third stage of her budding season. This involved the use of (sniff-sniff) key lime-flavoured lubricant and a penis extension made of cyber-silicone. Unfortunately (sniff-sniff) your lover was in the process of changing sex from female to male. Thus unsatisfied by the encounter (sniff-sniff) you relieved yourself by masturbating (sniff-sniff) in the shuttlepod (sniff-sniff) by means of the vacuum toilet (sniff-sniff) and a rubber barf bag."
— Farce Contact by Odon.
"Let me tell you, Toymaker, this nose of mine has never failed me, and if there are children here, my friend, you will die! Ha ha ha ha ha ha!"
Its sense of smell is 100 million times better than a human's, so even the faintest scent tells it about everything in the area. It's like it can see with its nose!