Okay, two weeks too late, but what the heck. One egg isn't an egg. Two egg is half an egg. Three egg is an Easter egg! (Dutch proverb)
Behold, the days come, that the plowman shall overtake the reaper, and the treader of grapes him that soweth seed; and the mountains shall drop sweet wine, and all the hills shall melt.
"Take things as they come....but make sure they come as you'd like to take them". (Me at age 19, next to my high-school yearbook photo).
I'm betting it's a pun, with the term for egg in the second part of each phrase also being a term for something such as an omelette.
The Peter Principle says : People are promoted to the level of their incompetence. Considering that line of thought- many of the people you work for in life will be incompetent.
Sorry to disappoint you guys. Originally it is just an excuse to have three eggs on Easter morning. Nowadays it is more of an excuse to have three of whatever you're having. Three kinds of soap, three beers, three boy/girlfriends, you name it.
Not me. I was born stupid, cradled until I was dull and I have never learnt a thing. Besides, I wasn't born incompetent. I was born in Vlissingen, The Netherlands.
You asked what happens if you follow British instructions on a US electronic system. The answer is arc welding.