[she blinked at that first, then smiled almost fondly. What an idiot.]

You don't know how to play but want to? How troublesome. [though she didn't mean it, and started to deal out five cards.] We can play standard. It's pretty simple, so long as you can remember what beats what.

[and if he's still interested to learn, she's slowly rattle off what each does, and how each wins over the other. Etc. Rules, you know.]