Bart and Lisa get the idea to write a cartoon themselves, when they see how bad Itchy & Scratchy has been getting...
Marge recieves an invitation to a high school reunion, but Homer doesn't get one... Homer thinks it's time to reveal his big secret to her.
"I ate those fancy soaps you bought for the bath tub"
(wait not that secret the other one)
"I never graduated from high school."
"Well that still doesn't explain why you ate my soap. wait, maybe it does."
Bart/Lisa's episode script gets rejected by the Itchy & Scratchy writers, so they try using their grandpa's name this time instead.
"Grandpa how'd you take off your underwear without taking off your pants?"
"I don't know"
Homer is mixing up memories of his teen years with memories of Happy Days episodes... Homer gets a lot of embarrassing awards for being a loser... then he gets even more humiliated when some guy announces that Homer never graduated.