If you asked him why he did it, he’d ask you why you have to pay extra for guacamole, when everybody wants it, and the restaurants could just roll it into the price of the tacos.
“But that’s not what I was asking,” you would likely say. He’d shrug and pick at his teeth and wait for you to give up.
That night when you were lying in bed and thinking about the whole thing, you might realize that it didn’t matter. He did what he did because of who he is. There’s wasn’t much more to it.