Going through cookies files is an interesting exercise.
Is there something you're not telling us about your browsing habits with all those *xxx* and *sex* cookies in there? Hmmm?
Mozilla also has a neat feature that allows you to let some cookies stay on your machine, yet block others. It requires manually looking at the cookies your mozilla has stored (Tasks | Privacy & Security | Cookie Manager). Click the "Don't allow removed cookies to be reaccepted later" checkbox.