Diabetes affects our blood vessels and nerves and therefore can affect any part of the body. However, certain parts of our body are affected more than other parts.
I don't think dogwoods have (much?) scent, maybe just lightly floral. The white petally looking things are not actually petals they are bracts, like a poinsettia has. There's something called an English dogwood that is very fragrant, but it isn't a true dogwood and is also known as mock orange. Bradford pears have a smell that this author described as sweaty socks, so if your tree doesn't smell very good that's probably it: http://www.gardenguides.com/106133-dogw ...
Dogwoods grown in full sun tend to produce more flowers. Flowering dogwood (Cornus florida) is native to the eastern half of the U.S. An average dogwood tree grows at a moderate rate, reaching a mature height of around 20 to 30 feet.n their natural habitat, dogwood trees often grow as understory trees in partial shade. As a landscape specimen, dogwoods do well in full sun to partial shade. Trees that grow in full sun often require more water than trees that grow in shady spots.