Sunshine-cured tobacco, Bastam, Iran Curing and subsequent ageing allow for with the gradual oxidation and degradation of carotenoids in tobacco leaf. This makes selected compounds within the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic taste that contributes to your "smoothness" with the smoke. https://sethngvkx.shivawiki.com/7253989/the_definitive_guide_to_cigarettes