Same dream over and over again??????????????

Ok, I am 13. Ever since I was about 3 or 4, I can clearly remember having the SAME EXACT DREAM A LOT. There are no things changed in the dream ever, it is exactly the same thing over and over again. The dream happens about once or twice a year. What I dream is not even anything serious/dramatic....Its actually kind of stupid in a way. Ok so I am always in this museum. There is always this brown haired tour guide. We walk over to this set of pipes, with like triangular roof-like tops on them. But the pipes are very long and thin. Like, a human couldn't even fit into them! Well even though they are small, the museum guide always says, quote " Back in the 1900's kids used to go to school in these"( I know, it sounds funny) Then she'd be like "Anyone wanna try it out"? "Or try to go in there?". Some random blonde girl, (who i don't even know in real life) somehow goes into the pipe. Then the guide starts explaining how imperfect and fat and flaw-filled our generation is. I always wake up right then.Weirdly, The lady wasn't even being harsh, she was saying all this in a nice calm voice. And I never know what happens to the blonde girl who goes into the pipes. She never comes out. I know it sounds stupid/funny, but when I am having the dream, it always seems to terrify me in my subconcious mode. Even though I wake up later, and realize its a stupid dream, and was funny, it still scares me when i wake up from it and while I'm having it. What is this all about?