As it is that time of the year, what came first, the chicken or the egg?

One theory is that the chicken is the egg’s way of creating another egg. Clear?

And now for some of the of ways English can use such a simple word:)

a good egg  
egg someone on 
go fry an egg  
have egg on one's face
kill the goose that lays the golden egg.
lay an egg
put all your eggs in one basket   
a rotten egg.
walk on egg shells
as sure as eggs 
a good egg
a nest egg
can't boil an egg

But for me eggs are off the  menu, especially boiled eggs! What a smell and what a disgusting taste and texture.And if eggs are so healthy, why are all the cakes we buy actually prepared with egg ''substitute'' and not real eggs, as per EU directives in regards to this matter.