Like a Brick.

Gah.
Once again, a thought has entered my head.
Not an unusual happening in itself, since it is quite a common thought for me, but this time it had some extra implications with it that hit my head like a brick, leaving me a bit dazed while I did the dishes.
This thought will need quite a lot of explaining, and I will have no way of assuring you understand it.  It will be vaguely complex, and the English language is not suited to handle it.

It's about time travel.


Sometime, later in life, I go back in time.
I go back in time to say 5 years ago from today.
I would not appear as an older man in that time, I would have my thoughts, my consciousness, my experiences, everything that makes myself that is not strictly physical me, put into a younger version of myself.
So let's say for an example I went back in time from when I was 20, to when I was 10.
I would then become a 10 year old who has all the knowledge, memories, personality, experiences, essentially exactly the same person, as that 20 year old.

That's the idea I go back to all the time, it's a fun one. Trying to convince people I really do know future events because I experienced them :P
You've understood all this? Good.
Here comes the tricky bit.

From now on, when I say "10 year old me", I mean the 20 year old who went back in time to inhabit the 10 year old's body.
Imagine the 10 year old me meets an old friend. The 20 year old knew this friend for years, but since he has gone back in time this is the first time the friend has ever met him.
He manages to convince this friend that he has come from the future, and is inhabiting the younger man's body.
They live a long and happy life, as good friends, knowing the pitfalls of the future (well, for up to 10 years in the future anyway).
Then at the end of their lifespan, the FRIEND goes back in time to inhabit their younger self's body (let's say a 10 year old again).
Now since the friend's entire life was that of which the 20 year old me had gone back in time, the friend would go back in time to meet the 10-year old me fresh out of time travel.
The 10 year old me remembers his 20 years of life, the time-traveled friend remembers their entire life spent together.
The 10 year old me easily convinces the friend of his time-travel, the friend then reveals that they TOO had time-traveled.
The 10 year old me then discovers the implication that had me so dazed while doing the dishes.
The friend spent, let's say 80, years of their life, with the 10 year old me.
He can never live that life, because it has already happened, and because the friend went back in-time, it never will happen.
The friend will have 80 years of memory of the 10 year old me, memories that the 10 year old me will NEVER HAVE.
He discovers that he spent a whole ENTIRE LIFE with this person, a life that he will NEVER REMEMBER, NEVER EXPERIENCE, and NEVER KNOW.

That would be such a painful realisation.
It would be just horrible.

And now for some random thoughts:
I should probably have a shower
I should probably brush my teeth
I should probably squirt some stuff up my nose
I want to make a Minecraft Adventure Map.
According to someone who did a TED Talk, Science has discovered that 8 hugs a day leads to a happier life.
I dislike pineapple.