Sun-cured tobacco, Bastam, Iran Curing and subsequent aging allow with the gradual oxidation and degradation of carotenoids in tobacco leaf. This produces certain compounds during the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes to your "smoothness" on the smoke. risky https://nuso77888.birderswiki.com/1272640/smoking_an_overview