Its a game you text someone and ask them "can i tap that" and you see what they say. If your good enought you might get laid. If your not then it will still be funny.
Me: When can i tap that
Her: I told you once, if you text my girlfriend again I'm gonna destroy you.
Me: This isn't Beth?
Her: No it's her boyfriend asshole.
Me: Could you ask her for me?