Can sugar be absorbed orally within seconds?
Yes we do. The first part of digestion starts in mouth. Digestion begins in the mouth, where chemical and mechanical digestion occurs. Saliva  produced by the salivary glands (located under the tongue and near the lower jaw), is released into the mouth. Saliva begins to break down the food, moistening it and making it easier to swallow. A digestive enzyme (amylase) in the saliva begins to break down the carbohydrates (starches and sugars).