Isn't it interesting that there is only one objective reality for
everyone and that nevertheless, we can only truly know ourselvs? When
two people are in love and they thoughts are in sync (they even finish
each other's sentences), they are said to be "interlocked" or "twin
souls" or any other expression, but in reality, it is just a syrupy
metaphor and we can never truly know what it is like to be in someone
else's shoes.

Do you think it will ever change? Do you think we will ever be capable
of peeking to the other side the way in the exact same way the words
suggest? I'm not interested in determining whether i'm the only one
who exists nor whether someone else's behaviour suggests his
independent existence. What i'm interested in is finding out what it's
like being that other person, experiencing his memories and his
reactions, sharing his success/failure moments, feeling his emotions,
etc. Many people are very happy and achieve things that others can
only dream of (or never take the necessary steps to achieve), some of
them seem so alien to us that we take them for a different breed of
humans, enhanced with super-abilities.

Take the division of the ugly/pretty or what have you. Different
life-experiences contribute to different life-stories. Some people's
resiliency is beyond words (how impressive it is) while others give-up
after the first failure.

I was always fascinated by how unique and incredible it is, how
separate everything is and yet, reality does seem to unify us,
still...

Is it conceivable that one day technology might allow something like that?

For me I think it is definitely possible. We may even be able to
provide glimpses today. Perhaps electronics, but it might be possible
through psychology and drugs. You would basically be deliberately
setting up a psychosis, so you have to answer the question: is it
"healthy" to do so?

We set up "masks", or presentations of how we want to be perceived. We
live with those perceptions so readily and it is so integrated into
our psychology -- our first challenge is to be able to remove the
"mask" and eliminate the preconceived perception of another person,
(and yourself), first.

I find most people are unaware of their masks or are even able to
separate their identity from their self and outward perception. Try
separating yourself from your gender, your race, your culture, your
language, your species, your role as a living entity. I would think,
to achieve this, you would have to be a master at zen while
simultaneously ingesting lots of LSD and peyote and ketamine to
achieve this state. If you can come to clarity on yourself, then you
need some way of merging your identity with someone else -- and not
just your perception of the other person. Even if you have achieved
this, you might find the rest of the world unable to accept your
discovery as objective and have real difficulties in communicating the
experience.

If you're really interested in experiencing anothers reality you would necessarily have to experience the reality of your own Self. Go beyond the objective experience of reality that is attached to the subjective. Go beyond the reflections of your own programs to the source of who you are. With the mind seated in the stillness of the absolute self there are no restrictions to the awareness other than those you put on it out of habit.

It doesn't require mass amounts of LSD, drugs can temporarily break open the veils of illusion but they also scar the natural ability of the mind to do so on its own.

IF you were to fully transcend any limitations in directing the awareness you would completely understand the reflection of yourself in the other person you see and experience when the awareness sits in the experience of the individual self. There is no other person, there is only reflection of what is inside of you.

Nevertheless, I am sometimes glad that I am unable to actually feel the pain others are experiencing.

Distanced by the ability to witness the translation of their experience into feelings, objectivity without the subjective attachment gives you a glimpse of the mind that is free from the filters of mental attachment to what experience is.

That must be easier said than done.

From the untrained mind, ya sure you betcha..

There were horrendous split personality tests done by the CIA in the 60's, one of the MKULTRA experiments. When they effectivly split a personality in two, you had two completly diffrent realities. That should give you some insight, achieving secondary reality is not as hard as it may seem. I would suggest Deep Hypnosis Identification, it doesnt have any side effects, simply a deep level of hypnosis where you identify yourself as another person and view reality in a diffrent way and you only have the memories of the person you identify as, while the hypnosis session is underway. Google for it, or look into Milton Erickson.