A good nose

Some people have good noses. B: I wish I had a good nose.

I don't mean good-looking. I mean good-smelling. B: Oh. But that can be a curse. A: Yes, because you can be too sensitive to odors. B: I'll say. My girlfriend has a nose like a drug dog. A: Did she catch you using drugs? B: Sort of. She knows whenever

You don't need a good nose for that—cigarettes stink. B: But when I sneak just one cigarette in the morning, she can smell it that evening! A: Boy, that is a good nose. B: I told her she should apply for a job at customs.