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Gary tends to think of carbs as pure sugar ... and 'sometimes' limits his consumption of breads based upon that fearful assumption. (For the record, carbs are a combo of fiber and sugars.)
Sugar (sucrose) is [effectively] half carbs and half fat (fructose is metabolized by the liver into fat, much like alcohol).
Actually, they are both carbohydrates. Sucrose is a combo of two simple sugars, glucose and fructose. Oddly, both glucose and fructose share identical chemical formula but their molecular structures are different.
Glucose is the sugar of preference by it body. Glucose generates insulin to be released into the bloodstream which facilitates glucose to be absorbed and metabolized immediately by the cells or stored as glycogen. Fructose does not generate insulin release and is only metabolized in the liver, as you mentioned. Fructose gets metabolized after sucrose and tends to be stored as fat (lipogenic), as opposed to glycogen. The body breaks sucrose into its basic two sugar components of glucose and fructose, then treats the sugars separately as described above.
Table sugar is a sucrose.