WHY DON'T WE PERCEIVE TIME?
Because all events pass simultaneously.
Two dimensions space-time (distance and time)
We have two people: the observer (OBS) and the experimental subject (ES).
In the following graph ES is at 3 meters from the OBS. According to the Relativity ES describes a straight line path.
But It's that the OBS also "describes a straight line path", his time goes by at the same manner that the SE's.
We have to conclude that the ES's trajectory, according to the graph, is a mathematical illusion.
Let's consider this another graph:
The ES gets away from the OBS at a speed of 1 m/s. The ES's path in the graph is a straight line inclined.
Here the OBS perceives the ES's movement as a separation, but in both cases time passes equal.