It's not just stupidity that is supposed to make all of the males in the audience nod and say, "That's me!" -- it's childlike laziness, too. Here's an Eggo waffles ad that boasts that it's so easy to make breakfast, even a lazy, stupid male can do it! Even though he quickly gets distracted by a game of kitchen golf:
"Look at this goddamn idiot. Eggo."
That kind of plays into another assumption -- that men resent their lives as normal citizens and want to revert to childhood to live in lazy, stupid bliss. Here's a Dodge Charger ad where the narrator gives a bitter narration of all the routine human things he's expected to do that day that somehow insult his manhood:
"I will shave. I will clean the sink after I shave ... I will listen to your opinion of my friends ... I will be civil to your mother ... I will put the seat down ... I will put my underwear in the basket ... and because I do this, I will drive the car I want to drive."
Smash cut to a muscle car roaring down the track:
The tag line is seriously "Man's. Last. Stand." Written by a person who's never met one.
That's right, males! Basic acts of adult communication and cleanliness mastered by most 15-year-olds are such an insult to your natural state of filth and social retardation that you need an expensive sports car to make up for it!
This frozen pizza ad shows us what happens if you don't give males some kind of vehicular incentive to clean up after themselves. They're basically dogs, obliviously tracking mud all through the house, until the female comes home to scold them:
"Gary, we just had the carpets cleaned yest- is that a turd?!"