Surprisingly, no one on this thread has mentioned the fact that Tim Horton's adds nicotine to their coffee to make it more addictive. I know this fact to be a true fact because a friend of mine knows a guy whose sister worked for a Timmy's back in New Brunswick for a while. Besides, it's common knowlege.

Apparently, Horton got the idea one morning when he was so hungover he used his Export A to stir his coffee. It wasn't until he burned his lips trying to ronson a teaspoon that he realised his mistake. Then he tasted the coffee and the rest is history.