Breaking news, it can also stain your teeth, and the excess sugar and creamer people put in can lead to wasted calories and cavities. Not to mention you'd better not have any caffiene after 2 pm or else it fu[dge]s up your sleep cycle, which has other health consequences.
I like my coffee black. I can't freaking stand sugar in coffee OR tea. Sweet tea is beyond disgusting and coffee with sugar is almost as bad. I MIGHT splash a bit of half and half or milk in a particularly crappy cup of coffee but that's as close as I get.