IIRC, I read that the receptor
forms differently in different people (same DNA but different end result... polymorphic or something), which they
said is why some people perceieve the smell of -None differently. I think the same article said that up to about
half of people can be "trained" to smell the scent after a while.
I've certainly noticed this happening with
me, I can notice -None much more easily than I could when I first started.
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