Zero?

He was scoring a series of zeros in tennis.
And he was blaming it on her.

She suggested that they stop texting. She was busy with her paella, anyway.
But he said he didn’t mind since zeros mean something else in tennis.

She got lost in her warm white chocolate bread pudding so she failed to pursue the topic.

The next morning, he sent her a message, making fun of her, teasing her that he had succeeded in leaving her flabbergasted and speechless.

She had no idea what he was talking about.

He called in disbelief.
And proceeded to walk her through the previous night’s exchange.

Unfortunately, the punch line was lost on her.
He whined with disappointment when she told him that she didn’t get it.

“You don’t know what zero is in tennis?!?,” he asked, half screaming, his voice thick with frustration.
She was amused to hear him lose his cool. She couldn’t imagine what the big deal was. She was giggling as he egged her to ask around.

So she hung up, logged on to Google and typed “zero in tennis”.

And then she was flabbergasted and speechless.