Synesthesia
This condition is considered a neurological deviation that can be characterized as a mixing of senses. To make it clearer, an example can be given: a person with this deviation may hear a sound and feel a visual or other sensation at the same time. For example, hearing what the color red sounds like or what the taste of purple is. Many do not consider this deviation a disease and may even equate it to a unique gift. Most often, this phenomenon does not cause any discomfort to its bearer, except for informational overload, or simply fatigue.