Diet

Last Friday I offered a friend a cup of tea, to which she said, "No, thank you.  I am on a diet."  My friend soon produced a bottle of cherry soda from her bag and drank it.  I had offered her a steaming cup of black tea, mind you, with real milk and real sugar on the side.  She had rejected the antioxidants in black tea in favor of fake sugar, flavoring and food coloring,  It wasn't even a diet soda, and yet she felt this was "healthy."  What gives?