It's like the bit that George Carlin used to do.

He would make fun of the inconsistancies of words and phrases.

The one that applies here is when his friend was going to go out and buy a new "Hot Water Heater".

Carlin asked him why he was going to buy a "Hot water heater" when what he really needed a "COLD water heater". Why did he need to make his hot water.... hot ?

You say TOE-MAY-TOE and I say TOE-MA-TOE.