Let me just mention strawberries, so exciting each year when they first appear.
A plant in the garden of my last house produced them in ones and threes, never more, in spring and into summer. You were lucky if the birds didn't get them first, so you ate them slowly, first inhaling their smell with gratitude. You may remember such a thing.
The plant grew where nothing with half a brain would dream of it, in rocky soil, on a hillside. It was neglected, seldom watered, and often forgotten - until the first flush of pink on the first berry.
Those berries had a perfume, actually, not a smell, unlike the artificial strawberry stuff they put in ice cream and milkshakes, whipped up in laboratories. Scientists never get the point about sensual things - think white-coated Masters and Johnson on the mechanics of sex. In any case, when was anything artificial as good as the real thing?
The smell of a ripe, real strawberry picked a second ago on a fine day is so good you wish you could wear it: fulsome, aromatic, delicious, and delicate. The berry seems too good to put in your mouth, but too enticing not to. Only raspberries can compete - later, in summer. They're worth staining your fingers and clothing for, and getting scratched - but it's strawberries that are the harbingers of our chilly spring.