If you have then, you might have noticed a kind of redolence, that actually transforms the ambience peaceful and closer to your heart. Mixture of oil, incence sticks, the smoke of aarti etc. all create an unusual kind of smell, which soothens mind and body. But you will not find such smell in those temples run in corporate style. Where a devotee is more treated like a customer!
The fragrances close to our heart are, undoubteldy the smell of first rain, baby's smell, a mango tree when in full bloom, and their likes......
Even now i enjoy the smell of first rain. That smell is enjoyable, since the rain itself comes when we are expecting it for long. When an infant places its tiny arms and hugs you closely, that affection, that warmth and sweet smell emanating from the baby brings peace to mind.
I've also noticed a fragrance in rice mills when they steam the paddy before drying. I dont know whether these kind of smells have positive impact on body. But flowers are used in aromatic treatment, which itself is an indication of the positive impact of fragrances on body. At least these give you mental happiness, which is invaluable.