I hate that things that taste good are bad for you. Mozzarella sticks, pizza, nachos, funnel cake, ice cream, cheeseburgers, pecan pie . . . I mean, it seems counter to evolution. Things that taste and feel good are supposed to be good for you. That's how our ancestors knew what was good for them. That's why sex feels so good, because it encourages us to perform the single most important act in achieving Evolution's goal of passing on our genes.
I equate eating unhealthy food with going to a strip club: it looks good and feels good during, but afterwards, you feel kinda bad about yourself, you're sheathed in a thin film of grease, and your girlfriend's mad at you.