Looking in your high school yearbook when you are older and recalling all of the girls/guys you have slept with by putting some kind of symbol or mark by their picture.
Person 1: Dude i found our old high school year book!
Person 2: Wow man you have been "drawing in the yearbook."
Person 1: I know aren't i such a bad ass?!
Person 2: No dude because this is my yearbook.