man: i have X things to do, Y time to do them in and Y isn't enough time to complete all the Xs man: time to optimize! with respect to... man: happiness! *soon* roommate: dude, stop playing video games! you havent gone to class in over a week! man: this makes me the happiest per time unit roommate: but this happiness is fleeting! you would be happier in the long run if you went to class and took exams! man: that sounds like philosophy... man: which i'm skipping right now