Fountain of youth' is actually kind of ambiguous - does it mean a way to make everyone healthy and let them live indefinitely? Or are we talking about something that would reset you physically to the way you were in your youth, which for various reasons not all of us would be enthused about?

I suspect that we get used to particular sorts of stories being presented in particular sorts of ways, and we're so used to interpreting them and understanding what it is they're doing that we think of those forms and styles as faithful, complete depictions of reality.

Science fiction in particular is often assumed to be about the future, or about some abstract technological or philosophical idea, or just about 'adventure,' but writers can't build worlds out of nothing. We use bits and pieces of the real world to assemble our fictional ones.

The Internet really lets people connect that wouldn't have in the past, and lets conversations happen and connections happen.