I've been probing a little into the actual foundations of my ethics the last week and I seriously can't rule out that the answer is "Saturday morning cartoons."
Good morals and philosophy require a stable Maslow's foundation.
Saturday mornings are special, the first taste of physical and mental freedom from school, the week's work is done and your parents are relaxed, which you feed off.
Congrats you just rediscovered the Sabbath.