The hippocampus is connected with all sensory organs. The connection applies to smelling, tasting, and seeing, as well as to hearing and the sense of balance. In this way, orientation in the environment is controlled by external perceptions. Hypothetically, the hippocampus could be described as an internal sensory organ that combines individual sensory perceptions into a whole and compares them with past experiences. Sensory perception is critical when searching for food, so it is unsurprising that the hippocampus is closely related to the circuits and hormones that regulate hunger and satiety. In this context, particularly sensitive sensory perception can also be an advantage. Such oversensitivity is found in people who are assigned to the autism spectrum. In most cases, these people have impaired social communication skills and stereotypical behavior. Hyperactivity and impulse control disorders are also associated with a variety of different manifestations of the autism spectrum. In these cases, natural selection of this phenotype may have occurred despite the disadvantages perceived in modern society. The ability to smell and taste better and to have increased sensory perception could have been a great advantage, especially when hunting, which led to natural selection of this type despite the limitations.