[Vocabulary] crave sth vs crave for sth

Does the preposition change the meaning of this sentence? Is it required or even possible to use?

As a thoroughbred customer I carve (for) reality.
Having read a chapter from her novel, everyone carved for more.

Although you may see crave for something, that is (I think) a recent usage. Traditionally you just crave it. You have a craving for​ the things you crave.

And you don't have a CARVING for anything!

What does "sth" mean?

Charlie Bernstein said:

And you don't have a CARVING for anything!

Click to expand...

I didn't even notice that.

I also wonder what a thoroughbred customer is.

Charlie Bernstein said:

I also wonder what a thoroughbred customer is.

Click to expand...

Clearly it's someone who just bought a racehorse.

I have a carving for a niche in my lounge room.

GoesStation said:

Clearly it's someone who just bought a racehorse.

Click to expand...

Then let's think of a better word than customer. No one walks into a store and asks for a racehorse.

Buyer? Investor?

And why would racehorse buyers crave reality more than others would?

Chess, can you tell us more about what you mean?