Aroma

I've noticed that if someone is wearing perfume, they don't have to tell you -- you know it!  Usually, pleasantly know it, assuming it is a pleasing fragrance and you are not allergic to it.  Perhaps that is what Paul means in 2 Corinthians 2: 14-16

In the Messiah, in Christ, God leads us from place to place in one perpetual victory parade. Through us, he brings knowledge of Christ. Everywhere we go, people breathe in the exquisite fragrance. Because of Christ, we give off a sweet scent rising to God, which is recognized by those on the way of salvation—an aroma redolent with life. But those on the way to destruction treat us more like the stench from a rotting corpse. [Message]