Egon's Law comes from the movie "Ghostbusters" and states: "Don't cross the streams". This is in reference to their energy packs, because if the streams are crossed, all existence gets destroyed.
The real-life usage of Egon's Law is applied when
two or more men are urinating
next to each other, perhaps in a community trough or a row of bushes. If anyone crosses their urine streams, those
two have violated Egon's Law (don't
cross streams!) and are therefore automatically gay.