What are some things that can not be shared?

Physical pain.

Good answer! Mental pain, too.

World of warfare gold.

Your Dreams are your own though maybe you can talk about them (Is that still sharing in a sense maybe) but no one else can share them they belong to you…. Oh we can’t/shouldn’t share our toothbrushes.

The Planet. It is all mine.

The space you take up?

Hm…well, it’s a hell of a reaction when they try!

I don’t think we can entirely share our minds. And maybe that’s a good thing. If it was otherwise, infatuations would surely never develop into full-blown relationships and it would just be all “been there, done that.” It’s nice that we can surprise each other, discover a small, glistening facet never before noticed even after decades of living together.

Toilet paper

Dreams. Yes, we can tell someone else what we remember about the dream story, but no way can we share the precise feelings the dream evoked.

That which you don’t have and the knowledge that’s unknown to you.

Personalities.

Underwear.

Your death.

A glass eye?

A chewed piece of gum.

ABC gum! Ew! But it can be shared. So can a glass eye if someone has only a hole in their socket.

I think glass eyes need to be custom fitted?
@Dutchess_III

@ibstubro Perhaps one can find it a lucky charm and carry it around in their pocket instead.

An itch.
A twitch.
The feel of a switch.