they say that by the time you are 20, 20% of your sense of smell is gone, and by the time you are 60, 60% of it is gone!
I lost a lot of my ability to smell during my years as a finish person in a cabinet shop. I usually wore a mask while actually spraying, but there was always a constant smell of lacquers, stains, removers, thinners, etc around there. Many times my wife will hand me something and say "here, does this smell bad to you too?" and I can't smell a thing, good or bad.
The way I can tell if the milk is going bad is if I can smell anything. If I can't smell it at all, its still good. If I can smell anything off the milk then its getting questionable or is past due.
JD nailed my favorite, lilacs at sunset. And I agree with Web on rain and fresh-baked bread.
I also ove the scent of burning pine logs in winter and of a freshly peeled tangerine in the morning. I like the smell of bed pillows, too - that faint lingering scent of shampoo and laundry soap that they hold.
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-- Heather: "I don't suffer from insanity, I enjoy every minute of it!"