I'm not a geneticist, wasn't raised by one, and haven't talked about double helices since grade twelve science class, and EVEN I ALSO TEAR MY HAIR OUT when they do this on tv. I just recently watched an episode of Star Trek Voyager that was like, "triple helix!" and I screamed "nooooooooooooo!" But it didn't do any good, because the tv writers didn't hear me.

Anyway, word. And no, I don't think it's a swimming in water thing. MANY PEOPLE KNOW THIS, or would if they thought about it for ten seconds. It's just tv laziness and scifi memes that get copypasted without any brains being involved.