Coffee is an acidic environment that damages enamel. Therefore, after it, you must definitely drink water. In addition, coffee attracts calcium and removes it from the body, which will also later affect the condition of the teeth.
If you drink coffee with sugar or sweets, the negative impact on the teeth increases. Sweets will be an excellent breeding ground for bacteria. Since the enamel is softened by the action of acid, it is easier for them to penetrate and damage it.