Why is candy bad for you?

I'm curious of the negative effects that candy can have on my body, other than the extra calories from eatting junk food. If you can be addicted to candy than I'd be the poster child. I don't think that I can go more than a day without eatting skittles, starburst, smarties, caramel, sweettarts, twix, or thousandgrand. Its not really the chocolet, but the sugar that I think I crave. Everyone tells me that I'd loose so much weight if I'd cut back on candy by 1/3 or drink a little less soda. And I know that they are right because I have really good portion sizes and I eat well balanced meals. But my weight isn't enough to make me give up candy and no one can give me a really good reason. So, if someone can help me understand why I should give up candy than I'd be happy. I can give up soda for a month and I have. After not drinking it for a month it was really gross. But I cant seam to give up candy. Please help me.