Dialogue between block and mortar

I am block, concrete all through
I am so strong and inexpensive
mortar, why do I really need you?
with your presence so extensive?

Block my friend and my old companion,
You'd be lost without my bonding
Colorado River without Grand Canyon
Or a bloody steak served to Gandhi.

Mortar my old and true acquaintance,
this block is rather disgusted
I almost puked at your reference
To Mahatma's diet entrusted

To mortar's odd whims and all
But together, we should stay
and just keep the solid wall
"block and mortar" for every day.

For ours is an ambivalent art
the question asked is if whether
the mortar keeps the blocks apart
or if it keeps 'em together.