Celina throws a punch to my head, which I block. "Getting better there, sweetheart," she says while trying again with a left hook. Even sweaty, Celina is a knockout. Her ponytail makes her look badass. Her designer workout gear is black with a turquoise stripe slashing across the front. I want to hate her just for being perfect, which is impossible because she's so damn nice.

I block the next punch too. "I'm a quick learner and besides, you hit like a girl." Yeah I'm on my ass ...