Satiation devices for controlling obesity and methods of implanting same are configured to create a small satiation pouch in the proximal portion of the stomach with a narrow passage leading into the lower portion of the stomach. The small satiation pouch is configured to collect a small amount of masticated food from the esophagus and the narrow passage delays emptying of the food from the satiation pouch into the larger part of the stomach, thereby causing a feeling of fullness.