Sun-cured tobacco, Bastam, Iran Curing and subsequent ageing let for the gradual oxidation and degradation of carotenoids in tobacco leaf. This makes selected compounds while in the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic taste that contributes to your "smoothness" on the smoke. https://holdenjzjtd.ouyawiki.com/1374104/smoking_an_overview