I think it’s because the aroma of coffee is so important to its flavor.
My wife prefers flavored coffees and I shy away from them.
I thought I’d gotten them mixed or there was residue in my coffee maker because my coffee kept tasting sweet and I don’t add sugar or use sweeteners at all.
Across the room was a candle in a jar, lid off, unlit, hazelnut coffee scented.
ACROSS THE ROOM it was enough to make me think my coffee was actually sweet. So yeah, it’s all about the smell.
What SKUmmy behavior.