EX#2:A hot chick in your dorm makes a cake. The cake is done, and wants to share it. Problem is, no one has a knife on hand, so she tasks you with cutting the cake. Sure you could run to your room and get a knife, but thats all the way down the hall. Whip out your driver's license, and bam! Not quite a knife, but cakes cut easy so it gets the job done just fine. If bitching about the cleanliness of the card occurs, rub it on her shirt.