i think you have an interesting idea here. it definately makes sense that if a person had an extra sense, nobody without that sense would understand.
kinda off topic, but this kinda relates with the way i can easily explain the idea of a fourth dimension to people. imagine if you were two
dimensional, like existing as a stick figure on a sheet of paper. your dimensions would consist of forward-back, and up-down. if something happened
involving the third dimension, like cutting the paper or punching a hole through it, being a 2 dimensional being, you would be able to conceive of it
or comprehend what was happening. i think this would explain a lot of paranormal things as happenings in the next dimension.
your ideas tie in well with the holographic universe theory, you should check it out link

