Square bread, round meat

Our son suggested I write something about why bread is square and lunch meat is round.
Cindy said a lot of lunch meat is square, except for bologna (pronounced baloney),

and she immediately started singing that song...

… Now there is something to write about: why is bo·lo·gna pronounced bəˈlō nē ?...
Anyway, after our son’s question on square verses round, Cindy commented on the lunch meat
that is oval in shape and therefore half a size too long for the bread...

... which led to a reference to the scene in Father of the Bride with Steve Martin buying hot dogs 
and hot dog buns, not being able to find a package of buns with equal dog quantities.
Such is the nature of family discussions!
In any case, I have no idea why the square bread and round meat dilemma exists, since
hamburger buns are round and hot dog buns are long, each designed to accommodate
their respective meats.

It is one of those mysteries of life...

But, I am reminded of what my mother-in-law used to say:

“You probably don’t want to know too much about the food you eat.”

I think she knew what she was talking about.