re: Is it possible for two people to have the same dream at the same time?

I can lucid dream.

I taught myself to check to see if I was dreaming. Throughout the day (or night) I would periodically ask myself "Am I dreaming?" as I deliberately took cognitive inventory of my surroundings and state of mind.

Of course, reality is self-revealing. It always feels real (mental disorders and mind-altering drugs notwithstanding). A dream can convince me it's reality, but reality cannot convince me it's a dream.

"If you have to ask, it's a dream," became my mantra. I repeated it to myself as my head hit the pillow each night. For me, the semiconscious thoughts of half-sleep, that moment before sleep were often the foundation of my dreams, or it was a fleeting moment throughout the day that entered my subconscious.

So I did what I intended to do, taught my subconscious to become keen and aware of its environment, and taught it the tips on detection that my conscious already knew.

I got into the habit. The first dozen or so times that I found myself dreaming and questioning whether I was dreaming, I immediately woke up. But I learned to accept the turmoil that occurs when I would realize I'm in a dream.

It's amazing and I probably spend most of my time flying

The ability to create as you dream, takes practice. Because despite the effectiveness of my habitual mantra, for whatever reason when creating I really have to focus and walk a mental tightrope of sorts while reminding myself that I'm in control.

I don't lucid dream as often anymore, because I've all but ceased the habit. But it's a skill, in the same way an athlete can let themselves physically lapse but then whip back into shape quickly. If I start my habit again, I'll start lucid dreaming again