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I presume you don't mean that whatever you touch you physically put in your mouth to taste (please correct me if I am mistaken).
Do you actually have to touch to produce the taste sensation or does saying/thinking the name of the substance produce the taste?
With the situation you mentioned about blindfolding, you can be unaware of what is placed in your hand and correctly detect the taste of it?
There is a condition called lexical-gustatory synesthesia, where saying a word can trigger the taste of it or a taste sensation (e.g., the word "blue" yields an "inky" taste), but in these cases, the person is fully aware of the object named.
Your "tactile-gustatory" talent borders more on psychometry, the ability to divine information from an object solely by touching or being near it. Very interesting! Anyone else in your family have this gift?
Pyschometry, and now you mention precognition, the ability to sense future events. Whether this talent is fantasy or reality, it all comes down to mental perception. I like to keep my mind open to all the possibilities!