Also amerifats, bazilians, middle easterns/jews find fatness appealing and normal.
Then there's another American stereotype. Bulky man and stick woman, but often times those don't have children.
Also the overachiever marrying the moron.(Futurama, Simpsons and Dan Vs)
Or two morons/Married with Children.
Or sub male with angry female, but both dumb(Cramp Twins, South Park Kyle's parents)
Or the overly caring parent with the overly careless parent.