You may not know it, but there’s also lots of other Murphys Laws which have been added and this site has kept track of them. For instance, Murphys Love Law states "
When a man's wife learns to understand him, she usually stops listening to him". Tthe lotto law says "if you match 4 numbers you will lose your ticket" and there’s a multitude of other Murphy Laws covering everything from Mothers to Fire Brigades to Photography.

Best of all is this one found in the Murphys Laws Of commerce section…."If at first you don't succeed, try again. Then quit. Well there’s no sense in being a damn fool about it."