Beavis and Butt-head struggle to avoid laughing for an entire week, or else they'll be expelled and sent to a school for juvenile delinquents. Problem is, Coach Buzzcut's teaching sex education, and he doesn't make this task easy for them. After telling Beavis and Butt-head that it's sex education week, Buzzcut starts teasing the boys to get them to laugh, saying that they'll be talking about the penis, the vagina, the testicles, venereal disease, sexual inter course, and mostly masturbation. After a while, Buzzcut takes roll call, starting with Butkis (this time, Beavis and Butt-head didn't laugh at this, resulting in Buttkiss laughing tauntingly at them) and other dirty-sounding names.
After school, Beavis and Butt-head rush out the doors, not being able to keep themselves from laughing anymore and they let it all out while sweating continuously and panting and gasping for air.
Buzzcut: Soooo, Beavis and Butthead. I understand Mr. McVicker has made a little arrangement with you guys, yeah a little probation. You see, class, Beavis and Butthead here, are not allowed to laugh for a whole week. That's right, and if they do laugh, they'll be expelled and they'll have to go to Hope High School where they'll get their asses kicked on a daily basis by all the other delinquents! Ha ha ha!['class 'giggles,'except for Beavis and Butthead who struggle to hold their laughter]
Buzzcut: Well I was real glad to hear that because this is Sex Education week. That's right, Sex Ed week! [Beavis and Butt-head struggle to hold in their laughter] We're gonna be talking about the PENIS! We'll be talking about the VAGINA! Do you think that's funny, Butthead?! Do you find it amusing that we'll be talking about the testicles?! [Butt-head strans to hold in his laughter] Yes we're also gonna be talking about Venereal Disease. Sexual intercourse! The Scrotum.The Clitoris.The Humping.Sabre-Toothed Tigers.Woolly Mammoth. And...And we will definitely be spending a LOT of time talking about MASTURBATION![class giggles; Beavis and Butt-head struggle to hold in their laughter] Well, now that's out of the way, let's take roll. Butkis!
Butkiss: Here. Ha ha ha.
Buzzcut: Gaylord! Hymen! [school bell rings and Beavis and Butt-head dart out of the doors, rapidly laughing. 30 minutes later, Beavis and Butt-Head are laughing normally]
On the Mike Judge collection DVD, most of this episode has been cut. In the original TV broadcast version, Beavis and Butt-head sit in the stalls contemplating their punishment before coming to Coach Buzzcut's class.
In the DVD version, when Buzzcut is teasing Butt-head, the lines "The scrotum! The clitoris!" are left out.
In the DVD version, a short scene where Coach Buzzcut calls roll is added after he teases Butt-head.
In the DVD version, a scene is added at the very end of "No Laughing Part 2," in which Beavis and Butt-head say things like, "He said "Penis"! Huh-huh!" In the original, the scene at the end of the episode was actually a carbon copy of the insect court scene from "Lawn and Garden."