Tantalized by a sexy yogurt advertisement on television, Beavis and Butt-Head decide they have to try some as soon as possible. Whey they get to the yogurt store they find the yogurt leaves a lot to be desired and the staff is less than sympathetic to their problems with it.
When Principal McVicker gets fed up with Beavis and Butt-head's constant stupidity and uncontrollable laughter on every word that looks dirty to them for the final time, he puts them on a No Laughing prohibition. If caught laughing once more in class, they risk expulsion.
In order to prove having children aren't cute, Coach Buzzcut assigns the students together and makes Beavis and Butt-Head work together on their assignment as respect for the female classmates who adamantly refuses to work with either one.