Does anybody know how to play 'Paper,rock,scissors' what Sam and Dean play in SPN? I dont know how to play it :(

So there are three options: rock, paper, or scissors. On the count of three both people pick one of the options and depending on what you pick someone wins the round. So here's what wins a round:
Rock crushes Scissors
Scissors cut Paper
Paper covers rock
If you both choose the same thing you go again until someone wins. I hope that helps!

It's such a simple game but I still pag-ibig it, lol! Maybe to explain just a little madami in case you're not familiar with it at all, you each start off with a closed fist. At the same time, you each bomba your arm up and down, 1, 2, and on the count of three, you each make a "symbol" of your choice with your hand. If you choose rock, you keep your fist closed. If you choose scissors, make a V sign with your index and middle finger. If you choose paper, open up your hand flat. How to win:

Rock dulls (or crushes!) scissors
Scissors cut paper
Paper covers rock

Dean always chooses scissors, therefore Sam always chooses rock, because rock beats scissors. If Dean would ever choose paper, he would win because paper can cover up the rock! :DDD