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 ...
Dogwood trees generally grow from about 25 to 30 feet, although the average home garden tree usually winds up on the small side, about 15 to 25 feet tall. One of the reasons homeowners love dogwoods so much is that they donât become so huge that they are hard to maintain or a hazard to power lines or roofs.