Although this is kind of a silly video, I think the dude has a point.
The 5 senses – especially touch – are extremely oversimplified.
Distinguishing proprioception (the ability to sense where you body parts are in space) as a separate sense seems very reasonable.
—
The Octopus is an interesting reference.
While they have a great sense of touch, octopi have a poor sense of proprioception.
Meanwhile they can taste stuff they touch.
An octopus’ suction cups are equipped with chemoreceptors so that the octopus can taste what it is touching.
—
Octopuses also don’t have stereognosis.
Meaning, they cannot “form a mental image of the overall shape of the object it is handling.”
They can “detect local texture variations, but cannot integrate the information into a larger picture.”
Maybe we should add this to the human tally as well…
We might learn a lot if the complexity of our senses was explained more thoroughly, and not in hard and fast categories.
And who’s to say out senses are a static reality. Evolution didn’t end with it’s discovery…