From a pretty good article in Fast Company of all places:
But come on, are sodas really so bad? Even coffee drinkers like to use a little sugar. Should we demonize coffee, too? Well, as a thought experiment, imagine that you’re in the office kitchen as a colleague adds some sugar to his coffee. As you watch, he adds a teaspoon. And then another. And another. And another. And another. And another. And another.And another. And another. And another. And another. And another. And another. And another. And another. And another. (Dude, want some coffee with your sugar?)