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 ...
Why Beagles smell bad - Whether it's a musty smell coming from the coat, an odd odor that you only notice once your Beagle comes back in or any other strange stinky issue, this article covers the possible reasons, ways to keep your puppy or dog smelling great and discusses what - exactly - is a 'hound dog smell'.