As a career teacher, I never found anything about B&B funny, or any blatant stupidity. I saw enough of it in everyday at work.
But I have to say, your choices for "favorite" movie lines are... revealing.
I can admit that under the age of ten I might have found some of the above movie lines amusing, thus the term "juvenile" humor. Once one reaches the teenage years and adulthood, bathroom humor just doesn't do it anymore for most people. A good laugh requires something clever, something absurd, something that you didn't see coming. Sadly, the dumbing down of America is alive and well.
Knowing you are a teacher, I know two things:
1. I feel bad for you guys having to deal with other people's dumb kids that are not raised right.
2. I also know that (especially in modern times) you teachers (and administrators) are evil, disgusting trash.
I grew up on old school cartoons:
1. Daffy getting is bill shot in all kinds of ways
2. Blowing everything up with the old school plunger box
3. Wile E. falling of a cliff a dozen times an episode
I never did anything wrong nor committed a crime. I never shot a duck just to see the bill spin around the head and make a funny noise.
I watched generations of wrestling:
1. "Baby Doll" (woman) getting slapped by bad guys and good guys
2. "Baby Doll" getting a forced kiss and her top almost ripped off
3. "Jim" (manager) hitting everybody with a tennis racket, including "Baby Doll"
4. "Dusty" getting his leg broken and breaking someone else's leg as revenge
5. "Sandman" walking to the ring smoking a cigarette, drinking a beer, and hitting everybody with a big stick
6. "DX" going to the ring, doing a crotch chop and all saying "suck it" as their catch phrase
7. "DX" bit on their "two newest members" where they were joking on "China's" breast augmentation
8. "Stone Cold" drinking bear and giving the middle finger to the boss
9. "The Rock" always wanting to stick things up other people's butts
10. "The Rock" calling women sluts, especially the bosses daughter
11. "Val" (man) going to the ring and talking with the porn metaphors
12. "Dudley Boys" power bombing various women through tables (including an elderly ex female wrestler, and a mature non-wrestler authority figure)
I never did anything wrong nor committed a crime. I don't drink beer. I don't smoke. I might give the middle finger to my boss one day. Some people are overdue for a bash on the head. I will judge "The Rock" on what he does now, not the stupid stuff from the 90s/00's
I have watched Beavis and Butthead:
1. I never hit a frog with a baseball bat
I never did anything wrong nor committed a crime. I am judgemental on music videos, TV shows, and movies (especially modern stuff), but not because of them two.
A big problem with society (especially modern times):
1. Nobody is parenting. People are having kids, but they are not raising their children. The so called adults are just as bad or worse that the kids.
2. Nobody has any morals. Nobody has any morality.
3. Social media has fast tracked in the dumbing down of society, as well as the corruption of society. It's enabling actual criminal behavior and crime.
4. Entertainment has fast tracked in the dumbing down of society, as well as the corruption of society. I grew up on Atari Pac-Man (I don't eat pills but I have ran around dark rooms listening to repetitive music). There is no way you can say that "Call Of Duty" doesn't have any effect on people (where, the goal is to shoot and kill people). Don't blame Beavis and Butthead for stupid crap that people know is stupid. Blame these disgusting horror movies (where, the goal of the evil is to kill people).
4. We are not tough on crime, punishment, and rehabilitation. I get mad when someone commits murder or rape, and is not given the death penalty. Get rid of them (and not this decades on death row crap). I don't care if their age is 8 or 80 . Rehabilitate the person who is not evil.
Again, I never did anything wrong nor committed a crime because of Beavis and Butthead. In fact, they have introduced me to music. Their commentary sometimes made the music bearable.