Sunlight-cured tobacco, Bastam, Iran Curing and subsequent aging allow for for that gradual oxidation and degradation of carotenoids in tobacco leaf. This creates specific compounds during the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic taste that contributes for the "smoothness" with the smoke. https://nuso78888.yourkwikimage.com/1351513/fascination_about_smoke