Murphy's law witicisms are features on this Irish tea towel:
Murphy’s Irish Law
Anything that can go wrong will.
Friends come and go. Enemies accumulate.
Beauty is only skin deep, ugliness goes to the bone.
Celibacy is not hereditary.
The other queue always moves faster.
Never play leapfrog with a unicorn.
A Smith & Wesson beats four aces.
To get a bank loan, you must first prove that you don't need it.
If all's going well, you obviously haven't a clue about what's going on.
Things enjoyable in life are either illegal, immoral or fattening.
(Murphy was an optimist!)