In junior high school, when we were studying geometry, the common consensus was that two parallel lines never intersect. Somebody was really thinking outside of the box and mentioned the illusion that two parallel lines appear to intersect when looked at in three dimensions (if that makes any sense), such as railroad track. Now I can't look at railroad tracks without thinking that parallel lines could intersect. Alas, they most likely do not in our universe. But it's nice to think of another universe where those two parallel lines, always side by side, brush away the laws of physics to unit in a passionate embrace. Excuse me while I go write my second short science fiction story ever.